What is the difference between geocentric and heliocentric
•Download as PPTX, PDF•
7 likes•5,458 views
The geocentric theory states that the Earth is at the center of the universe and all other celestial bodies revolve around it. The ancient Greeks like Aristotle supported this view. Ptolemy later revised the geocentric model so the planets moved in smaller circular orbits within larger ones. Copernicus proposed the heliocentric theory, which placed the Sun at the center with planets revolving around it. Galileo later provided evidence supporting the heliocentric view by observing the phases of Venus and Jupiter's moons orbiting something other than Earth. The heliocentric theory is now accepted as describing our solar system.
Report
Share
Report
Share
Recommended
Heliocentric vs Geocentric models
This is a PowerPoint presentation about the difference between the geocentric and heliocentric models
Spherical earth
Claudius Ptolemy was a 2nd century Greek writer known for his work in mathematics, astronomy, geography, astrology, and poetry. He lived in Alexandria, Egypt and wrote in Greek. He is best known for publishing the Almagest, which supported the theory that the Earth is at the center of the universe. Nicolaus Copernicus was a 16th century mathematician and astronomer who formulated a model of the universe that placed the Sun, not the Earth, at the center. Tycho Brahe was a 16th century Danish astronomer known for his accurate astronomical and planetary observations, which were five times more accurate than previous observations. His data helped advance the Copernican model. Galileo Galilei was a 17th
A. history of astronomy
1. The document discusses the history of astronomy from ancient Greek ideas of a geocentric universe to Copernicus' heliocentric model.
2. Key figures discussed include Ptolemy, who developed the geocentric model that dominated for over 1000 years, and Copernicus, who proposed placing the Sun at the center.
3. Kepler later determined that planets orbit in ellipses rather than circles, establishing his three laws of planetary motion.
Earths shape
The document provides evidence that Earth is spherical in shape. It discusses how ancient Greek philosopher Aristotle observed that ships appeared to sink below the horizon when viewed from shore, indicating the surface of Earth is curved. Additional evidence mentioned includes photographs of Earth from space showing its spherical shape, the round shadow cast on the moon during lunar eclipses, and the changing positions of celestial objects from different locations on Earth. The document seeks to explain how people were able to determine Earth was round over 2000 years ago based on observations of ships at sea.
Geocentric vs heliocentric
The document discusses geocentric and heliocentric models of the solar system. The geocentric Ptolemaic model placed Earth at the center, while Copernicus proposed a heliocentric model where Earth and planets revolve around the sun. Copernicus developed his model through observations that found inaccuracies in the Julian calendar. Galileo later provided experimental evidence supporting Copernicus' model, though the Church condemned his findings and tried him for heresy.
The History of Astronomy
The document traces the development of scientific understanding of the solar system from ancient times to the modern era. It describes early geocentric models proposed by Anaximander and Ptolemy that placed Earth at the center. Later thinkers such as Aristarchus, Copernicus, and Galileo proposed heliocentric models with the Sun at the center. Kepler determined orbits were elliptical rather than circular, and Newton explained planetary motion through universal gravity. Edwin Hubble's discovery of an expanding universe led to the development of the Big Bang theory.
Geocentric Model
The document describes several ancient geocentric models of the universe:
- The Pythagorean model placed Earth stationary at the center with celestial bodies orbiting in perfect circular motion. Plato and Eudoxus later expanded on this model using concentric spheres to explain planetary retrograde motion.
- Aristotle's model also used concentric spheres driven by an outer Prime Mover, and divided the universe into terrestrial and celestial realms separated by the moon's orbit. He provided evidence Earth was spherical.
- Ptolemy further refined the geocentric model by introducing the idea of epicycles, where planets orbit along smaller circles that move along a larger circular deferent, better explaining planetary variations. His model survived over
Heliocentric model
The document discusses the development of the heliocentric theory from Aristotle to Galileo. It began with Aristarchus proposing a heliocentric model over 2000 years ago, though the geocentric Ptolemaic system remained dominant. Nicolaus Copernicus later revived the heliocentric theory in the 16th century, providing a simplified mathematical model. Johannes Kepler further developed the theory through his laws of planetary motion. Galileo Galilei then provided strong observational evidence in favor of heliocentrism through his telescopic discoveries. The heliocentric theory fundamentally changed astronomical and scientific understanding.
Recommended
Heliocentric vs Geocentric models
This is a PowerPoint presentation about the difference between the geocentric and heliocentric models
Spherical earth
Claudius Ptolemy was a 2nd century Greek writer known for his work in mathematics, astronomy, geography, astrology, and poetry. He lived in Alexandria, Egypt and wrote in Greek. He is best known for publishing the Almagest, which supported the theory that the Earth is at the center of the universe. Nicolaus Copernicus was a 16th century mathematician and astronomer who formulated a model of the universe that placed the Sun, not the Earth, at the center. Tycho Brahe was a 16th century Danish astronomer known for his accurate astronomical and planetary observations, which were five times more accurate than previous observations. His data helped advance the Copernican model. Galileo Galilei was a 17th
A. history of astronomy
1. The document discusses the history of astronomy from ancient Greek ideas of a geocentric universe to Copernicus' heliocentric model.
2. Key figures discussed include Ptolemy, who developed the geocentric model that dominated for over 1000 years, and Copernicus, who proposed placing the Sun at the center.
3. Kepler later determined that planets orbit in ellipses rather than circles, establishing his three laws of planetary motion.
Earths shape
The document provides evidence that Earth is spherical in shape. It discusses how ancient Greek philosopher Aristotle observed that ships appeared to sink below the horizon when viewed from shore, indicating the surface of Earth is curved. Additional evidence mentioned includes photographs of Earth from space showing its spherical shape, the round shadow cast on the moon during lunar eclipses, and the changing positions of celestial objects from different locations on Earth. The document seeks to explain how people were able to determine Earth was round over 2000 years ago based on observations of ships at sea.
Geocentric vs heliocentric
The document discusses geocentric and heliocentric models of the solar system. The geocentric Ptolemaic model placed Earth at the center, while Copernicus proposed a heliocentric model where Earth and planets revolve around the sun. Copernicus developed his model through observations that found inaccuracies in the Julian calendar. Galileo later provided experimental evidence supporting Copernicus' model, though the Church condemned his findings and tried him for heresy.
The History of Astronomy
The document traces the development of scientific understanding of the solar system from ancient times to the modern era. It describes early geocentric models proposed by Anaximander and Ptolemy that placed Earth at the center. Later thinkers such as Aristarchus, Copernicus, and Galileo proposed heliocentric models with the Sun at the center. Kepler determined orbits were elliptical rather than circular, and Newton explained planetary motion through universal gravity. Edwin Hubble's discovery of an expanding universe led to the development of the Big Bang theory.
Geocentric Model
The document describes several ancient geocentric models of the universe:
- The Pythagorean model placed Earth stationary at the center with celestial bodies orbiting in perfect circular motion. Plato and Eudoxus later expanded on this model using concentric spheres to explain planetary retrograde motion.
- Aristotle's model also used concentric spheres driven by an outer Prime Mover, and divided the universe into terrestrial and celestial realms separated by the moon's orbit. He provided evidence Earth was spherical.
- Ptolemy further refined the geocentric model by introducing the idea of epicycles, where planets orbit along smaller circles that move along a larger circular deferent, better explaining planetary variations. His model survived over
Heliocentric model
The document discusses the development of the heliocentric theory from Aristotle to Galileo. It began with Aristarchus proposing a heliocentric model over 2000 years ago, though the geocentric Ptolemaic system remained dominant. Nicolaus Copernicus later revived the heliocentric theory in the 16th century, providing a simplified mathematical model. Johannes Kepler further developed the theory through his laws of planetary motion. Galileo Galilei then provided strong observational evidence in favor of heliocentrism through his telescopic discoveries. The heliocentric theory fundamentally changed astronomical and scientific understanding.
Models-of-the-Universe.pptx
Here are two potential responses in 2-3 sentences each:
1. I would show my flat-earther friend that no matter which way I point the Frisbee, it will always cast a circular shadow on the ball, demonstrating that only a spherical object can do this. Eratosthenes proved the Earth was round using a similar shadow experiment over 2000 years ago.
2. Tycho Brahe spent over 20 years meticulously recording the positions of planets with unprecedented accuracy. This treasure trove of observational data was invaluable for Kepler to analyze and discover the elliptical orbits of planets, replacing the imperfect circular/epicyclic models. Without Brahe's precise records, Kepler would not have been able to derive his revolutionary laws of planetary
Who first Knew the Earth was Round?
- Ancient civilizations like the Armenians as early as 5500 BC understood that the Earth was round and rotated on its axis based on astronomical observations.
- Sailors and people who climbed mountains were also able to observe that the Earth was curved based on the changing positions of stars and seeing the horizon curve away.
- By around 1000 BC, ancient Babylonians and Greeks had calculated and conceived that the Earth was a sphere based on further observations and mathematics.
- In 230 BC, Eratosthenes directly calculated the circumference of the Earth using shadows and geometry, providing strong empirical evidence the Earth was spherical.
- By the time of early Christianity 200-300 AD and Islam in the 7th century,
Helio vs geo 2
No, the Sun is not the center of the Universe. The Copernican model established that the Earth and planets orbit the Sun, but the Sun is just one star among billions in the Milky Way galaxy, which itself is one of trillions of galaxies in the observable universe.
Heliocentric model and Copernicus
Nicolaus Copernicus was a Polish astronomer who proposed the heliocentric model in the early 16th century, placing the Sun at the center of the universe rather than the Earth. He studied mathematics and astronomy at the University of Cracow and later held a position as a canon at Frombork Cathedral, which allowed him time for his astronomical research. His heliocentric theory challenged the geocentric Ptolemaic model that had been dominant for over 1,000 years, and it took some time for his ideas to gain acceptance due to conflicts with the dominant religious authorities of the time.
Greek astronomy
This document provides an overview of early Greek astronomy from Plato to Ptolemy. It discusses how Plato and Aristotle viewed the universe, with Plato believing in uniform circular motion and Aristotle recognizing lunar phases and arguing that the moon reflects sunlight. It then covers how later Greek astronomers like Hipparchus made important advances, including developing star catalogs and discovering precession. The document concludes with Claudius Ptolemy, who synthesized the knowledge in his influential book "The Almagest," establishing the geocentric Ptolemaic system as the standard model for over 15 centuries.
The heliocentric theory
The document discusses the heliocentric theory developed by Nicolaus Copernicus which placed the Sun, not the Earth, at the center of the universe. It outlines the key principles of the heliocentric theory, including that celestial bodies revolve around the Sun, the Earth orbits the Sun in a sphere, and Earth's motion around the Sun causes the apparent retrograde motion of planets. The heliocentric theory challenged the geocentric Ptolemaic system and faced opposition from the church.
Early Models of the Universe
The document summarizes several historical models of the universe:
1) Eudoxus of Cnidus proposed a geocentric model in the 4th century BC with concentric spheres and the first systematic explanation of planetary motion.
2) Aristotle also proposed a geocentric model, believing Earth was stationary at the center and composed of four elements.
3) Aristarchus proposed the first heliocentric model in the 3rd century BC, placing the Sun at the center with the Earth and planets orbiting it.
4) Ptolemy proposed a refined geocentric model in the 2nd century AD explaining planetary motions with epicycles and deferents.
5) Copernicus published his he
Copernicus
Nicolaus Copernicus was a Renaissance man who made revolutionary contributions to astronomy and mathematics in the 16th century. He was born in 1473 in Torun, Poland and studied astronomy, philosophy, medicine, and law at several universities. Copernicus developed the heliocentric model that placed the Sun at the center of the solar system, as presented in his influential book "On the Revolutions of the Celestial Spheres". Though his theory was initially condemned, it was later supported by scientists like Galileo and Kepler and marked a major turning point in science.
History of Astronomy
1. The document discusses the history of astronomy from ancient to modern times. It describes early astronomical observations and the development of models to explain celestial motions from prehistoric times through the Classical period.
2. During the Renaissance, improved observations and technology led to more accurate models. Copernicus proposed a heliocentric model of the solar system. Kepler described planetary motions with his laws, and Newton later explained Kepler's laws with his theory of universal gravitation.
3. Modern astronomy advanced with inventions like the telescope. Figures like Galileo, Tycho Brahe, and Hubble made important observational discoveries, and Einstein's theories revolutionized understanding of space and time.
Geocentric and heliocentric model
The document compares the geocentric and heliocentric models of the universe. The geocentric model, developed by ancient Greek and Roman astronomers, placed Earth at the center with all other objects orbiting around it. The heliocentric model, proposed by Copernicus during the Scientific Revolution, correctly placed the Sun at the center with Earth and other planets orbiting around it. While the geocentric model was developed early on, the heliocentric model provides a more accurate description of the motions in our solar system.
2018 2019 geocentric theory model vs heliocentric theory model revised
The document compares the geocentric and heliocentric models of the solar system.
1) The geocentric model, proposed by Aristotle, placed Earth at the center with all other celestial bodies revolving around it. 2) Copernicus proposed the heliocentric model, which placed the Sun at the center with Earth and other planets orbiting around it. 3) Galileo provided evidence supporting the heliocentric model through astronomical observations with his telescope, though he was condemned by the Catholic Church for his findings.
History Of Astronomy
1) Astrology claims personality and life are determined by star and planet positions at birth, but lacks scientific evidence.
2) Ancient Greeks first tried explaining natural events without gods. Ptolemy reasoned Earth was the center of the universe, an idea accepted for 1500 years due to visual appearance.
3) Copernicus found evidence for a sun-centered solar system, upsetting many. Kepler used Tycho Brahe's data to discover elliptical orbits and laws of planetary motion.
Chapter 1
Chapter 1 of the History of Astronomy discusses prehistoric astronomy and early astronomical observations. It describes how early civilizations noticed the motions of the Sun, Moon, planets and stars and used them for timekeeping. It then discusses the development of models of the solar system from ancient Greek astronomers like Aristotle, Ptolemy and Copernicus to Renaissance scientists like Brahe, Kepler and Galileo. Key developments included determining the Earth and Moon's sizes, the heliocentric model of the solar system, and Kepler's laws of planetary motion. The growth of astrophysics in the 18th-19th centuries led to new discoveries and technologies.
3. Diurnal and Annual Motion.pptx
The document describes three motions of the sky: diurnal motion caused by the Earth's daily rotation, annual motion caused by the Earth's revolution around the sun making the sun appear to shift eastward over the course of a year, and precession of the equinoxes where the Earth's axis slowly changes direction over 26,000 years causing the equinoxes to precess through the constellations.
The Models of the Universe
The document discusses the history of models of the universe from ancient geocentric to modern heliocentric models. It describes early geocentric models from Thales of Miletus, Anaximander of Miletus, and Pythagoras that proposed the Earth was flat or cylindrical at the center. Later models from Ptolemy, Aristotle, and others incorporated spheres to explain planetary motions. The heliocentric model was proposed by Aristarchus of Samos but gained acceptance after Copernicus' "On the Revolution of Celestial Orbs" in 1543 despite religious objections. Key figures like Brahe, Galileo, and Kepler further developed and supported the heliocentric model through observations and Kepler's laws
Origin of universe
1. The formation and evolution of the Solar System began about 4.57 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center to form the Sun, while the rest flattened into a protoplanetary disk from which the planets, moons, asteroids and other small bodies formed.
2. According to the nebular hypothesis, Earth formed about 4.54 billion years ago from accretion of planetary material in the solar nebula. Within the first 100-200 million years, early Earth had formed extensive oceans and seas.
3. Key events in the development of early Earth included the formation of its layered internal structure through the sinking of
Ptolemy
Claudius Ptolemy was a 2nd century Greek astronomer whose contributions included compiling astronomical and geographical knowledge of the Roman Empire in his treatises Almagest, Geographia, and Tetrabiblos. In Almagest, he proposed the geocentric Ptolemaic system to explain planetary motions, using epicycles and eccentric circles to account for retrograde motion. This system placed the Earth at the center of the universe and remained the dominant model of astronomy for over 1,000 years until Copernicus proposed a heliocentric model. Ptolemy's Geographia also compiled geographical coordinates of the known world.
Astronomical event before the advent of telescope
- Ancient Babylonian and Egyptian civilizations systematically observed and recorded the motions of the sun, moon, and planets without telescopes. They noted the sun rises in the east and sets in the west, and its rising and setting points varied over the course of a year.
- They observed the moon's changing appearance over 29.5 days in its phases from a thin crescent to a full circular disk. Lunar eclipses where the Earth casts its shadow on the moon were also noticed.
- Constellations were patterns of visible stars that helped with navigation, timekeeping of calendars, and recognizing stars. Five planets - Mercury, Venus, Mars, Jupiter, and Saturn - could be seen without telescopes
Astronomy and the invention of Telescope
Before telescopes, ancient civilizations observed astronomical phenomena like star clusters and used constellations for agriculture and navigation. The Greeks developed geocentric models to mathematically describe planetary motions, prioritizing mathematical accuracy over physical reality. In the early 1600s, Hans Lippershey invented the telescope and Galileo was the first to use it for astronomy, discovering lunar craters, Jupiter's moons, Venusian phases, and sunspots, challenging existing paradigms.
Motions of the Sky, Models of the Universe and Kepler's Laws of Planetary Motion
Motions of the Sky, Models of the Universe and Kepler's Laws of Planetary MotionFernando Altares, Jr.
Focuses on the motions of the sky, the development of models of the universe and the three laws of Kepler on Planetary MotionHOW GREEKS KNEW EARTH IS SPHERICAL1.1.pptx
The Greeks knew the Earth was spherical through several lines of evidence:
- Pythagoras first proposed a spherical Earth around 500 BC.
- Anaxagoras observed circular shadows on the Moon during lunar eclipses, indicating the Earth was round.
- Aristotle made detailed arguments including that the North Star appears higher in the sky the farther north you travel, and ships disappear over the horizon progressively from bottom to top.
- Eratosthenes calculated the circumference of Earth by measuring the sun's angle at different locations, arriving at a value close to modern measurements.
Science model solar system
Aristotle proposed in 322 BC that planets and stars moved in concentric spheres centered on Earth. Ptolemy proposed the geocentric model in 150 BC where Earth was the center of the universe and all heavenly bodies revolved around it, a view held for 1400 years. Copernicus proposed the heliocentric model in 1543 stating that the sun, not Earth, was the center of the universe with planets revolving around it. Newton later explained in the 1600s that the orbit of the Moon and planets was due to the sun's gravitational force.
More Related Content
What's hot
Models-of-the-Universe.pptx
Here are two potential responses in 2-3 sentences each:
1. I would show my flat-earther friend that no matter which way I point the Frisbee, it will always cast a circular shadow on the ball, demonstrating that only a spherical object can do this. Eratosthenes proved the Earth was round using a similar shadow experiment over 2000 years ago.
2. Tycho Brahe spent over 20 years meticulously recording the positions of planets with unprecedented accuracy. This treasure trove of observational data was invaluable for Kepler to analyze and discover the elliptical orbits of planets, replacing the imperfect circular/epicyclic models. Without Brahe's precise records, Kepler would not have been able to derive his revolutionary laws of planetary
Who first Knew the Earth was Round?
- Ancient civilizations like the Armenians as early as 5500 BC understood that the Earth was round and rotated on its axis based on astronomical observations.
- Sailors and people who climbed mountains were also able to observe that the Earth was curved based on the changing positions of stars and seeing the horizon curve away.
- By around 1000 BC, ancient Babylonians and Greeks had calculated and conceived that the Earth was a sphere based on further observations and mathematics.
- In 230 BC, Eratosthenes directly calculated the circumference of the Earth using shadows and geometry, providing strong empirical evidence the Earth was spherical.
- By the time of early Christianity 200-300 AD and Islam in the 7th century,
Helio vs geo 2
No, the Sun is not the center of the Universe. The Copernican model established that the Earth and planets orbit the Sun, but the Sun is just one star among billions in the Milky Way galaxy, which itself is one of trillions of galaxies in the observable universe.
Heliocentric model and Copernicus
Nicolaus Copernicus was a Polish astronomer who proposed the heliocentric model in the early 16th century, placing the Sun at the center of the universe rather than the Earth. He studied mathematics and astronomy at the University of Cracow and later held a position as a canon at Frombork Cathedral, which allowed him time for his astronomical research. His heliocentric theory challenged the geocentric Ptolemaic model that had been dominant for over 1,000 years, and it took some time for his ideas to gain acceptance due to conflicts with the dominant religious authorities of the time.
Greek astronomy
This document provides an overview of early Greek astronomy from Plato to Ptolemy. It discusses how Plato and Aristotle viewed the universe, with Plato believing in uniform circular motion and Aristotle recognizing lunar phases and arguing that the moon reflects sunlight. It then covers how later Greek astronomers like Hipparchus made important advances, including developing star catalogs and discovering precession. The document concludes with Claudius Ptolemy, who synthesized the knowledge in his influential book "The Almagest," establishing the geocentric Ptolemaic system as the standard model for over 15 centuries.
The heliocentric theory
The document discusses the heliocentric theory developed by Nicolaus Copernicus which placed the Sun, not the Earth, at the center of the universe. It outlines the key principles of the heliocentric theory, including that celestial bodies revolve around the Sun, the Earth orbits the Sun in a sphere, and Earth's motion around the Sun causes the apparent retrograde motion of planets. The heliocentric theory challenged the geocentric Ptolemaic system and faced opposition from the church.
Early Models of the Universe
The document summarizes several historical models of the universe:
1) Eudoxus of Cnidus proposed a geocentric model in the 4th century BC with concentric spheres and the first systematic explanation of planetary motion.
2) Aristotle also proposed a geocentric model, believing Earth was stationary at the center and composed of four elements.
3) Aristarchus proposed the first heliocentric model in the 3rd century BC, placing the Sun at the center with the Earth and planets orbiting it.
4) Ptolemy proposed a refined geocentric model in the 2nd century AD explaining planetary motions with epicycles and deferents.
5) Copernicus published his he
Copernicus
Nicolaus Copernicus was a Renaissance man who made revolutionary contributions to astronomy and mathematics in the 16th century. He was born in 1473 in Torun, Poland and studied astronomy, philosophy, medicine, and law at several universities. Copernicus developed the heliocentric model that placed the Sun at the center of the solar system, as presented in his influential book "On the Revolutions of the Celestial Spheres". Though his theory was initially condemned, it was later supported by scientists like Galileo and Kepler and marked a major turning point in science.
History of Astronomy
1. The document discusses the history of astronomy from ancient to modern times. It describes early astronomical observations and the development of models to explain celestial motions from prehistoric times through the Classical period.
2. During the Renaissance, improved observations and technology led to more accurate models. Copernicus proposed a heliocentric model of the solar system. Kepler described planetary motions with his laws, and Newton later explained Kepler's laws with his theory of universal gravitation.
3. Modern astronomy advanced with inventions like the telescope. Figures like Galileo, Tycho Brahe, and Hubble made important observational discoveries, and Einstein's theories revolutionized understanding of space and time.
Geocentric and heliocentric model
The document compares the geocentric and heliocentric models of the universe. The geocentric model, developed by ancient Greek and Roman astronomers, placed Earth at the center with all other objects orbiting around it. The heliocentric model, proposed by Copernicus during the Scientific Revolution, correctly placed the Sun at the center with Earth and other planets orbiting around it. While the geocentric model was developed early on, the heliocentric model provides a more accurate description of the motions in our solar system.
2018 2019 geocentric theory model vs heliocentric theory model revised
The document compares the geocentric and heliocentric models of the solar system.
1) The geocentric model, proposed by Aristotle, placed Earth at the center with all other celestial bodies revolving around it. 2) Copernicus proposed the heliocentric model, which placed the Sun at the center with Earth and other planets orbiting around it. 3) Galileo provided evidence supporting the heliocentric model through astronomical observations with his telescope, though he was condemned by the Catholic Church for his findings.
History Of Astronomy
1) Astrology claims personality and life are determined by star and planet positions at birth, but lacks scientific evidence.
2) Ancient Greeks first tried explaining natural events without gods. Ptolemy reasoned Earth was the center of the universe, an idea accepted for 1500 years due to visual appearance.
3) Copernicus found evidence for a sun-centered solar system, upsetting many. Kepler used Tycho Brahe's data to discover elliptical orbits and laws of planetary motion.
Chapter 1
Chapter 1 of the History of Astronomy discusses prehistoric astronomy and early astronomical observations. It describes how early civilizations noticed the motions of the Sun, Moon, planets and stars and used them for timekeeping. It then discusses the development of models of the solar system from ancient Greek astronomers like Aristotle, Ptolemy and Copernicus to Renaissance scientists like Brahe, Kepler and Galileo. Key developments included determining the Earth and Moon's sizes, the heliocentric model of the solar system, and Kepler's laws of planetary motion. The growth of astrophysics in the 18th-19th centuries led to new discoveries and technologies.
3. Diurnal and Annual Motion.pptx
The document describes three motions of the sky: diurnal motion caused by the Earth's daily rotation, annual motion caused by the Earth's revolution around the sun making the sun appear to shift eastward over the course of a year, and precession of the equinoxes where the Earth's axis slowly changes direction over 26,000 years causing the equinoxes to precess through the constellations.
The Models of the Universe
The document discusses the history of models of the universe from ancient geocentric to modern heliocentric models. It describes early geocentric models from Thales of Miletus, Anaximander of Miletus, and Pythagoras that proposed the Earth was flat or cylindrical at the center. Later models from Ptolemy, Aristotle, and others incorporated spheres to explain planetary motions. The heliocentric model was proposed by Aristarchus of Samos but gained acceptance after Copernicus' "On the Revolution of Celestial Orbs" in 1543 despite religious objections. Key figures like Brahe, Galileo, and Kepler further developed and supported the heliocentric model through observations and Kepler's laws
Origin of universe
1. The formation and evolution of the Solar System began about 4.57 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center to form the Sun, while the rest flattened into a protoplanetary disk from which the planets, moons, asteroids and other small bodies formed.
2. According to the nebular hypothesis, Earth formed about 4.54 billion years ago from accretion of planetary material in the solar nebula. Within the first 100-200 million years, early Earth had formed extensive oceans and seas.
3. Key events in the development of early Earth included the formation of its layered internal structure through the sinking of
Ptolemy
Claudius Ptolemy was a 2nd century Greek astronomer whose contributions included compiling astronomical and geographical knowledge of the Roman Empire in his treatises Almagest, Geographia, and Tetrabiblos. In Almagest, he proposed the geocentric Ptolemaic system to explain planetary motions, using epicycles and eccentric circles to account for retrograde motion. This system placed the Earth at the center of the universe and remained the dominant model of astronomy for over 1,000 years until Copernicus proposed a heliocentric model. Ptolemy's Geographia also compiled geographical coordinates of the known world.
Astronomical event before the advent of telescope
- Ancient Babylonian and Egyptian civilizations systematically observed and recorded the motions of the sun, moon, and planets without telescopes. They noted the sun rises in the east and sets in the west, and its rising and setting points varied over the course of a year.
- They observed the moon's changing appearance over 29.5 days in its phases from a thin crescent to a full circular disk. Lunar eclipses where the Earth casts its shadow on the moon were also noticed.
- Constellations were patterns of visible stars that helped with navigation, timekeeping of calendars, and recognizing stars. Five planets - Mercury, Venus, Mars, Jupiter, and Saturn - could be seen without telescopes
Astronomy and the invention of Telescope
Before telescopes, ancient civilizations observed astronomical phenomena like star clusters and used constellations for agriculture and navigation. The Greeks developed geocentric models to mathematically describe planetary motions, prioritizing mathematical accuracy over physical reality. In the early 1600s, Hans Lippershey invented the telescope and Galileo was the first to use it for astronomy, discovering lunar craters, Jupiter's moons, Venusian phases, and sunspots, challenging existing paradigms.
Motions of the Sky, Models of the Universe and Kepler's Laws of Planetary Motion
Motions of the Sky, Models of the Universe and Kepler's Laws of Planetary MotionFernando Altares, Jr.
Focuses on the motions of the sky, the development of models of the universe and the three laws of Kepler on Planetary MotionWhat's hot (20)
2018 2019 geocentric theory model vs heliocentric theory model revised
2018 2019 geocentric theory model vs heliocentric theory model revised
Motions of the Sky, Models of the Universe and Kepler's Laws of Planetary Motion
Motions of the Sky, Models of the Universe and Kepler's Laws of Planetary Motion
Similar to What is the difference between geocentric and heliocentric
HOW GREEKS KNEW EARTH IS SPHERICAL1.1.pptx
The Greeks knew the Earth was spherical through several lines of evidence:
- Pythagoras first proposed a spherical Earth around 500 BC.
- Anaxagoras observed circular shadows on the Moon during lunar eclipses, indicating the Earth was round.
- Aristotle made detailed arguments including that the North Star appears higher in the sky the farther north you travel, and ships disappear over the horizon progressively from bottom to top.
- Eratosthenes calculated the circumference of Earth by measuring the sun's angle at different locations, arriving at a value close to modern measurements.
Science model solar system
Aristotle proposed in 322 BC that planets and stars moved in concentric spheres centered on Earth. Ptolemy proposed the geocentric model in 150 BC where Earth was the center of the universe and all heavenly bodies revolved around it, a view held for 1400 years. Copernicus proposed the heliocentric model in 1543 stating that the sun, not Earth, was the center of the universe with planets revolving around it. Newton later explained in the 1600s that the orbit of the Moon and planets was due to the sun's gravitational force.
Ancient Astronomy ppt.ppt
The document discusses the history of astronomy from ancient times through the 16th century. It describes how early civilizations like the Egyptians studied the movements of celestial objects and how the Greeks developed the first models of the universe, with the geocentric model of Aristotle and Ptolemy placing Earth at the center. The document then outlines the shift to the heliocentric model of Copernicus and the laws of planetary motion discovered by Kepler, based on Tycho Brahe's accurate observations. It concludes by discussing Galileo's astronomical discoveries using the telescope, which provided support for the heliocentric model.
Early model of the Universe
The document discusses early models of the universe including the ideas that the Earth was flat and then spherical. It describes models from Greek philosophers like Aristotle who believed the Earth was at the center of the universe and surrounded by spheres carrying the planets and stars. Later models from Copernicus, Brahe and Kepler placed the Sun at the center with Earth and other planets orbiting around it, moving astronomy toward a heliocentric understanding of the solar system.
powerpoint presentation model of the universe.pptx
The document discusses early models of the universe from ancient Greek philosophers like Aristotle and Ptolemy who believed the Earth was at the center, to Copernicus who revived the heliocentric model placing the Sun at the center. It also covers Tycho Brahe who found errors in both the geocentric and Copernican models and gathered accurate observations over 20 years, paving the way for Kepler to discover his laws of planetary motion and establish an elliptical model of the universe.
Ss history
The document discusses the transition from the geocentric model of the universe proposed by Aristotle and Ptolemy, which placed Earth at the center, to the heliocentric model proposed by Copernicus, which placed the Sun at the center. Copernicus' model was initially rejected but gained support from Galileo's astronomical observations with the telescope. Tycho Brahe proposed a hybrid model but Johannes Kepler used Tycho's data to show planets orbit in ellipses, supporting the heliocentric model. Isaac Newton later explained orbital motions through his law of universal gravitation.
Science 2
The document discusses the geocentric theory, which was the dominant model of the universe from ancient Greece until the 16th century. It states that under the geocentric theory, Earth is at the center of the universe and all other celestial bodies revolve around it. The theory was first proposed by ancient Greek philosophers like Aristotle and Ptolemy. It was later replaced by Copernicus' heliocentric theory, which placed the Sun at the center. The document provides details on the Ptolemaic system and key figures like Galileo who provided evidence supporting the heliocentric view.
Nikhil Mogalapalli Science 2
The document discusses the geocentric theory, which was the dominant model of the universe from ancient Greece until the 16th century. It held that Earth is at the center of the universe, and all other celestial bodies revolve around it. Key aspects included that planets moved in circular orbits using epicycles and deferents, and the order of orbits. The theory was eventually replaced by the heliocentric model of Copernicus, Galileo and Kepler, which placed the Sun at the center.
Physical science chapter1 for shs
The Greek's viewed the universe as having celestial and terrestrial motion, with objects moving in perfect circular orbits around a spherical Earth at the center. Models of the universe differed on the orbital center - either Earth, Sun, or concentric spheres. Kepler's Laws showed planetary orbits are elliptical with the Sun at one focus, areas are swept equal in equal time, and orbital periods increase with orbital radius.
The Evolution of Physics and Astronomy.pptx
Slide show of a class by Dr. Aldemaro Romero Jr. for his course "History and Philosophy of Scince" taught in the early 2000s at Arkansas State University
PHYSICAL SCIENCE (EARTH&SPACE)
BIG BANG THEORY
GREEKS' VIEWS ABOUT MOTION AND UNIVERSE
GALILEO'S OBSERVATION ABOUT UNIVERSE
KEPLER'S LAW
MODELS OF THE UNIVERSE.pptx
The document discusses early models of the universe from ancient civilizations. It describes how the Egyptians, Babylonians and Assyrians used astronomy to develop calendars based on star and planet movements to aid agriculture. It also explains how ancient structures like the pyramids and Stonehenge were precisely aligned based on astronomical observations. The document then summarizes several geocentric and heliocentric models of the universe proposed by early Greek astronomers, including those of Thales, Anaximander, Pythagoras, Plato, Eudoxus, Aristotle, Apollonius, Hipparchus and Ptolemy, before noting Aristarchus and Copernicus proposed heliocentric models with the sun at the center
The Origin of Modern Astronomy
Astronomy is the oldest of the natural sciences, dating back to antiquity, with its origins in the religious, mythological, cosmological, calendrical, and astrological beliefs and practices of pre-history: vestiges of these are still found in astrology, a discipline long interwoven with public and governmental astronomy, and not completely disentangled from it until a few centuries ago in the Western World (see astrology and astronomy). In some cultures, astronomical data was used for astrological prognostication.
Ancient astronomers were able to differentiate between stars and planets, as stars remain relatively fixed over the centuries while planets will move an appreciable amount during a comparatively short time.
astronomers.ppt
The document discusses several important figures from the Scientific Revolution era who contributed to developments in the heliocentric model of the solar system. It describes Ptolemy's geocentric model, followed by Copernicus publishing his heliocentric theory. Galileo then used the telescope to observe evidence supporting Copernicus, while Kepler deduced his laws of planetary motion from Tycho Brahe's observations.
MODEL OF THE UNIVERSE5675657576576574.pptx
Ancient Greek astronomers developed early geocentric models of the universe with Earth at the center. Eudoxus created the first such model in 380 BC as a series of concentric spheres carrying the stars, sun, moon and planets around Earth. Later, Aristarchus proposed a heliocentric model placing the sun at the center in the 3rd century BC, but it was not widely accepted. Ptolemy's 2nd century AD geocentric model placed Earth at the center surrounded by nested spheres carrying objects in our solar system and became the accepted model for over 1,000 years until Copernicus revived Aristarchus' heliocentric theory in 1543.
1. Astronomy, Astronomers and their Contributions.pptx
This document provides an overview of the history and development of astronomy. It describes some of the key figures throughout history and their contributions, including:
- Plato and Aristotle, who proposed early models of the universe with Earth at the center
- Aristarchus, who first proposed a heliocentric model of the solar system
- Copernicus, who revived Aristarchus' heliocentric theory
- Kepler, who discovered his three laws of planetary motion providing strong evidence for the heliocentric model
- Galileo and Newton, who provided further evidence for the heliocentric model and proposed gravity as the force governing planetary motion.
modelsoftheuniverse-180314022355.pdf
The document summarizes several historical models of the universe:
1) Eudoxus of Cnidus proposed a geocentric model in the 4th century BC with concentric spheres and the first systematic explanation of planetary motion.
2) Aristotle also proposed a geocentric model, believing Earth was stationary at the center and composed of four elements.
3) Aristarchus proposed the first heliocentric model in the 3rd century BC, placing the Sun at the center with the Earth and planets orbiting it.
4) Ptolemy proposed a refined geocentric model in the 2nd century AD explaining planetary motions with epicycles and deferents.
5) Copernicus published his he
3rd Universe Model .pptx
The document discusses models of the early universe proposed by ancient Greeks. It describes both geocentric models which placed Earth at the center, including those of Pythagoras, Plato, Aristotle, and Ptolemy involving celestial spheres, and heliocentric models like Aristarchus' which placed the Sun at the center. The models attempted to explain observations of planetary motions and positions of celestial objects in the sky through the early Greeks' philosophical and religious perspectives before the invention of advanced astronomical tools.
Introduction to cosmology
1) The document discusses ancient Greek and early modern scientific models of cosmology and the solar system. It describes models proposed by thinkers like Aristotle, Ptolemy, Copernicus, Brahe, Galileo and Kepler.
2) Key events included Galileo's observations of Jupiter's moons and Venus' phases, which supported Copernicus' heliocentric model over the Ptolemaic geocentric one. Brahe made accurate observations without telescopes that challenged Aristotelian ideas.
3) Kepler developed his laws of planetary motion based on Brahe's observations, establishing elliptical orbits with the Sun at one focus and relationships between orbital periods and distances. This provided strong evidence for the Copernican model of a Sun-
Helio vs geo 2 ge notes
This document discusses the Copernican Revolution and the transition from the geocentric to heliocentric models of the solar system. It describes the geocentric model proposed by Aristotle and Ptolemy, which placed Earth at the center. Problems with this model included its inability to explain retrograde motion of planets and phases of Venus. The document then introduces the heliocentric model proposed by Copernicus, which placed the Sun at the center. Key figures who contributed to the acceptance of the heliocentric model included Tycho Brahe, Johannes Kepler, and Galileo Galilei through their observations and scientific work.
Similar to What is the difference between geocentric and heliocentric (20)
powerpoint presentation model of the universe.pptx
powerpoint presentation model of the universe.pptx
1. Astronomy, Astronomers and their Contributions.pptx
1. Astronomy, Astronomers and their Contributions.pptx
Recently uploaded
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...
Functional Magnetic Resonance Imaging (fMRI) provides means to characterize brain activations in response to behavior. However, cognitive neuroscience has been limited to group-level effects referring to the performance of specific tasks. To obtain the functional profile of elementary cognitive mechanisms, the combination of brain responses to many tasks is required. Yet, to date, both structural atlases and parcellation-based activations do not fully account for cognitive function and still present several limitations. Further, they do not adapt overall to individual characteristics. In this talk, I will give an account of deep-behavioral phenotyping strategies, namely data-driven methods in large task-fMRI datasets, to optimize functional brain-data collection and improve inference of effects-of-interest related to mental processes. Key to this approach is the employment of fast multi-functional paradigms rich on features that can be well parametrized and, consequently, facilitate the creation of psycho-physiological constructs to be modelled with imaging data. Particular emphasis will be given to music stimuli when studying high-order cognitive mechanisms, due to their ecological nature and quality to enable complex behavior compounded by discrete entities. I will also discuss how deep-behavioral phenotyping and individualized models applied to neuroimaging data can better account for the subject-specific organization of domain-general cognitive systems in the human brain. Finally, the accumulation of functional brain signatures brings the possibility to clarify relationships among tasks and create a univocal link between brain systems and mental functions through: (1) the development of ontologies proposing an organization of cognitive processes; and (2) brain-network taxonomies describing functional specialization. To this end, tools to improve commensurability in cognitive science are necessary, such as public repositories, ontology-based platforms and automated meta-analysis tools. I will thus discuss some brain-atlasing resources currently under development, and their applicability in cognitive as well as clinical neuroscience.
Orion Air Quality Monitoring Systems - CWS
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
BREEDING METHODS FOR DISEASE RESISTANCE.pptx
Plant breeding for disease resistance is a strategy to reduce crop losses caused by disease. Plants have an innate immune system that allows them to recognize pathogens and provide resistance. However, breeding for long-lasting resistance often involves combining multiple resistance genes
The binding of cosmological structures by massless topological defects
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills of Minnesota developed a method to convert waste into high-value dry fertilizer, significantly enriching soil quality. By providing farmers with a valuable resource derived from waste, Travis Hills helps enhance farm profitability while promoting environmental stewardship. Travis Hills' sustainable practices lead to cost savings and increased revenue for farmers by improving resource efficiency and reducing waste.
Bob Reedy - Nitrate in Texas Groundwater.pdf
Presented at June 6-7 Texas Alliance of Groundwater Districts Business Meeting
What is greenhouse gasses and how many gasses are there to affect the Earth.
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
20240520 Planning a Circuit Simulator in JavaScript.pptx
Evaporation step counter work. I have done a physical experiment.
(Work in progress.)
Nucleophilic Addition of carbonyl compounds.pptx
Nucleophilic addition is the most important reaction of carbonyls. Not just aldehydes and ketones, but also carboxylic acid derivatives in general.
Carbonyls undergo addition reactions with a large range of nucleophiles.
Comparing the relative basicity of the nucleophile and the product is extremely helpful in determining how reversible the addition reaction is. Reactions with Grignards and hydrides are irreversible. Reactions with weak bases like halides and carboxylates generally don’t happen.
Electronic effects (inductive effects, electron donation) have a large impact on reactivity.
Large groups adjacent to the carbonyl will slow the rate of reaction.
Neutral nucleophiles can also add to carbonyls, although their additions are generally slower and more reversible. Acid catalysis is sometimes employed to increase the rate of addition.
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...Abdul Wali Khan University Mardan,kP,Pakistan
hematic appreciation test is a psychological assessment tool used to measure an individual's appreciation and understanding of specific themes or topics. This test helps to evaluate an individual's ability to connect different ideas and concepts within a given theme, as well as their overall comprehension and interpretation skills. The results of the test can provide valuable insights into an individual's cognitive abilities, creativity, and critical thinking skillsDERIVATION OF MODIFIED BERNOULLI EQUATION WITH VISCOUS EFFECTS AND TERMINAL V...
In this book, we use conservation of energy techniques on a fluid element to derive the Modified Bernoulli equation of flow with viscous or friction effects. We derive the general equation of flow/ velocity and then from this we derive the Pouiselle flow equation, the transition flow equation and the turbulent flow equation. In the situations where there are no viscous effects , the equation reduces to the Bernoulli equation. From experimental results, we are able to include other terms in the Bernoulli equation. We also look at cases where pressure gradients exist. We use the Modified Bernoulli equation to derive equations of flow rate for pipes of different cross sectional areas connected together. We also extend our techniques of energy conservation to a sphere falling in a viscous medium under the effect of gravity. We demonstrate Stokes equation of terminal velocity and turbulent flow equation. We look at a way of calculating the time taken for a body to fall in a viscous medium. We also look at the general equation of terminal velocity.
Deep Software Variability and Frictionless Reproducibility
Deep Software Variability and Frictionless ReproducibilityUniversity of Rennes, INSA Rennes, Inria/IRISA, CNRS
The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
Inspired by David Donoho's vision, this talk aims to revisit the three crucial pillars of frictionless reproducibility (data sharing, code sharing, and competitive challenges) with the perspective of deep software variability.
Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
I will then present some software engineering and AI techniques that can support the strategic exploration of variability spaces. These include the use of abstractions and models (e.g., feature models), sampling strategies (e.g., uniform, random), cost-effective measurements (e.g., incremental build of software configurations), and dimensionality reduction methods (e.g., transfer learning, feature selection, software debloating).
I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
Exposé invité Journées Nationales du GDR GPL 2024
Leaf Initiation, Growth and Differentiation.pdf
Leaf initiation, growth and differentiation, genetic control of leaf development.
ESR spectroscopy in liquid food and beverages.pptx
With increasing population, people need to rely on packaged food stuffs. Packaging of food materials requires the preservation of food. There are various methods for the treatment of food to preserve them and irradiation treatment of food is one of them. It is the most common and the most harmless method for the food preservation as it does not alter the necessary micronutrients of food materials. Although irradiated food doesn’t cause any harm to the human health but still the quality assessment of food is required to provide consumers with necessary information about the food. ESR spectroscopy is the most sophisticated way to investigate the quality of the food and the free radicals induced during the processing of the food. ESR spin trapping technique is useful for the detection of highly unstable radicals in the food. The antioxidant capability of liquid food and beverages in mainly performed by spin trapping technique.
Unveiling the Energy Potential of Marshmallow Deposits.pdf
Unveiling the Energy Potential of Marshmallow Deposits: A Revolutionary
Breakthrough in Sustainable Energy Science
ANAMOLOUS SECONDARY GROWTH IN DICOT ROOTS.pptx
Abnormal or anomalous secondary growth in plants. It defines secondary growth as an increase in plant girth due to vascular cambium or cork cambium. Anomalous secondary growth does not follow the normal pattern of a single vascular cambium producing xylem internally and phloem externally.
Recently uploaded (20)
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...
Deep Behavioral Phenotyping in Systems Neuroscience for Functional Atlasing a...
The binding of cosmological structures by massless topological defects
The binding of cosmological structures by massless topological defects
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
What is greenhouse gasses and how many gasses are there to affect the Earth.
What is greenhouse gasses and how many gasses are there to affect the Earth.
20240520 Planning a Circuit Simulator in JavaScript.pptx
20240520 Planning a Circuit Simulator in JavaScript.pptx
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
THEMATIC APPERCEPTION TEST(TAT) cognitive abilities, creativity, and critic...
DERIVATION OF MODIFIED BERNOULLI EQUATION WITH VISCOUS EFFECTS AND TERMINAL V...
DERIVATION OF MODIFIED BERNOULLI EQUATION WITH VISCOUS EFFECTS AND TERMINAL V...
Deep Software Variability and Frictionless Reproducibility
Deep Software Variability and Frictionless Reproducibility
ESR spectroscopy in liquid food and beverages.pptx
ESR spectroscopy in liquid food and beverages.pptx
aziz sancar nobel prize winner: from mardin to nobel
aziz sancar nobel prize winner: from mardin to nobel
Unveiling the Energy Potential of Marshmallow Deposits.pdf
Unveiling the Energy Potential of Marshmallow Deposits.pdf
What is the difference between geocentric and heliocentric
- 1. What is the difference between geocentric and heliocentric theories?
- 2. Geocentric vs Heliocentric • “Geo” means Earth • “Helio” means sun
- 3. Ancient Observations • The ancient Greeks observed the sky and noticed that the moon, sun, and stars seemed to move in a circle around the Earth. • It seemed that the Earth was not moving and everything in the heavens revolved around the Earth. • As it turned out, it was very difficult to prove that the planets did not revolve around the Earth without leaving the planet.
- 4. Geocentric Theory • Ancient Greeks such as Aristotle believed that the universe was perfect and finite, with the Earth at the exact center. • This is the geocentric theory, which stated, the planets, moon, sun, and stars revolve around the Earth.
- 5. Ptolemy (85-165 AD) • In AD 140 the Greek astronomer Ptolemy revised the geocentric model to explain all the planetary motions. • His model had the planets move in little circles that also moved in bigger circles. • This belief persisted for about 1500 years.
- 7. Copernicus (1473-1543) • In the early 1500’s the polish astronomer Copernicus suggested that the Sun, not Earth, was the center of the solar system and the planets revolved around it. • This is the Heliocentric Theory. Helios means “sun” in Greek.
- 9. Problems with Geocentric Theory? • Galileo first saw evidence that objects revolved around something besides the Earth when he found Jupiter's Moons • Galileo also saw that Mercury and Venus went through phases, just like our moon. The outer planets Mars, Jupiter and Saturn did not.
- 10. Heliocentric Theory Prevails • Galileo supported Copernicus’ theory which clashed with the religious views of the time, he underwent many trials and tribulations, and was even sentenced to house arrest for his remaining years. • His view has withstood the test of time. • Today we talk about our Solar System, not our Earth system
- 13. Ticket out the door… • Draw and label the heliocentric and geocentric theories. • Be sure to explain each theory!! • Discuss each person, and how they revised the theory.