Kepler’s Laws
Yep, all three!
Greek Observations
Early Greeks were the first to truly notice the
planets in our solar system. In fact, planets is
Greek...
Ptolemy (Greek astronomer)
Ptolemy believed, as other Greeks did, that
Earth was at the center; however, he
hypothesized ...
Copernicus’s Revolution!
Polish Astronomy, Nicolaus Copernicus helped
to develop the heliocentric model, where the
sun is...
Good old Galileo Galilei
Because Galileo use the newly invented
telescope, he was able to discover more than his
predeces...
Tycho Brahe & Johannes Kepler
Late 1500’s, Danish astronomer Tycho Brahe and
his assistant Johannes Kepler worked over a ...
Kepler’s 1st Law
Through his observations of Mars’s orbit, he
discovered his first law:
The Orbital path of the planets ...
Kepler’s 2nd Law
Kepler then discovered that the speed of a
given planet changes as it revolves around the
sun.
The clos...
Kepler’s 3rd Law
Kepler also discovered that the time it takes a
planet to orbit the sun and it’s average
distance from t...
Kepler’s 3rd Law
Kepler also discovered that the time it takes a
planet to orbit the sun and it’s average
distance from t...
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Keplers laws

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Keplers laws

  1. 1. Kepler’s Laws Yep, all three!
  2. 2. Greek Observations Early Greeks were the first to truly notice the planets in our solar system. In fact, planets is Greek for wanderers. Greeks believed that the earth was spinning within a larger dome called the celestial sphere. Greeks believed in a geocentric model, where the earth is at the center.
  3. 3. Ptolemy (Greek astronomer) Ptolemy believed, as other Greeks did, that Earth was at the center; however, he hypothesized that the planets were moving on flat planes. The Geocentric model was accepted as truth for nearly 1,500 years!
  4. 4. Copernicus’s Revolution! Polish Astronomy, Nicolaus Copernicus helped to develop the heliocentric model, where the sun is at the center rather than the Earth. Many people had trouble accepting this model, even into the 1600’s!
  5. 5. Good old Galileo Galilei Because Galileo use the newly invented telescope, he was able to discover more than his predecessors. Galileo discovered 4 moons orbiting Jupiter (known as the Galilean Moons) Galileo also helped to support and develop the heliocentric model.
  6. 6. Tycho Brahe & Johannes Kepler Late 1500’s, Danish astronomer Tycho Brahe and his assistant Johannes Kepler worked over a 20 year period collecting data through observations of the night’s sky. After Brahe died in 1601, Kepler continued to analyze and study the data- from that came his 3 laws.
  7. 7. Kepler’s 1st Law Through his observations of Mars’s orbit, he discovered his first law: The Orbital path of the planets are NOT circular- they are an ellipse (oval shape). This discovery disproved the long help belief of circular orbits.
  8. 8. Kepler’s 2nd Law Kepler then discovered that the speed of a given planet changes as it revolves around the sun. The closer a planet is to the sun, the faster it moves. The farther away it is, the slower it moves.
  9. 9. Kepler’s 3rd Law Kepler also discovered that the time it takes a planet to orbit the sun and it’s average distance from the sun are directly related. The closer a planet is to the sun, the faster it’s revolution. The farther a planet is, the slower the revolution.
  10. 10. Kepler’s 3rd Law Kepler also discovered that the time it takes a planet to orbit the sun and it’s average distance from the sun are directly related. The closer a planet is to the sun, the faster it’s revolution. The farther a planet is, the slower the revolution.
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