Copernicus and Heliocentric theory

1. COPERNICUS AND HELIOCENTRIC THEORY

2. INDEX
• Geocentrism
• Ptolomaic geocentrism
• Nicolaus Copernicus
• His life
• Heliocentric theory
• The Copernican revolution
• Impact and corrections of heliocentrism

3. PREVIOUS THEORIES (GEOCENTRISM)

Definition

Why was it thought?

Early Geocentrism

4. PTOLOMAIC GEOCENTRISM

Ptolomaic model

By who was it developed?

What are the differences betwwen early geocentrism and the
Ptolomaic model?

5. NICOLAUS COPERNICUS

6. HIS LIFE

Renaissance mathematician and astronomer

Born in Royal Prussia

Became an orphan when he was 10.

7. HIS LIFE

Heliocentrism

Died in Frombork, Poland (24th
May 1543)

8. THE HELIOCENTRIC THEORY

9. EARLY DEVELOPMENT OF HELIOCENTRISIM

ARISTARCHUS OF SAMOS
“You King Gelon are aware the 'universe' is the name given by most astronomers to
the sphere the center of which is the center of the Earth, while its radius is equal
to the straight line between the center of the Sun and the center of the Earth. This
is the common account as you have heard from astronomers. But Aristarchus has
brought out a book consisting of certain hypotheses, wherein it appears, as a
consequence of the assumptions made, that the universe is many times greater
than the 'universe' just mentioned. His hypotheses are that the fixed stars and the
Sun remain unmoved, that the Earth revolves about the Sun on the circumference
of a circle, the Sun lying in the middle of the orbit, and that the sphere of fixed
stars, situated about the same center as the Sun, is so great that the circle in
which he supposes the Earth to revolve bears such a proportion to the distance of
the fixed stars as the center of the sphere bears to its surface.”
Archimedes, The Sand Reckoner

10. THE COPERNICAN REVOLUTION
Commentariolus' seven principles (1514)

Celestial bodies donot all revolve around a single point.

The center of Earth is the center of the lunar sphere.

All the spheres rotate around the Sun.

The distance between Earth and the Sun is an insignificant fraction
of the distance from Earth and Sun to the stars.

The stars are immovable

Earth is moved in a sphere around the Sun

Earth’s orbital motion around the Sun causes the seeming reverse in
direction of the motions of the planets

11. IMPACT AND CORRECTIONS OF HELIOCENTRISM

Galileo Galilei
Jupiter moons
Sunspots
Imperfections in the surface of the Moon

Johannes Kepler
Eliptical orbits

12. Bibliography

http://www.universetoday.com/33113/heliocentric-model/

https://en.wikipedia.org/wiki/Heliocentrism

http://astro.unl.edu/naap/ssm/heliocentric.html