* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download The History of Astronomy
Tropical year wikipedia , lookup
Discovery of Neptune wikipedia , lookup
Kepler (spacecraft) wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Corvus (constellation) wikipedia , lookup
History of Mars observation wikipedia , lookup
Theoretical astronomy wikipedia , lookup
Lunar theory wikipedia , lookup
Astrobiology wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Patronage in astronomy wikipedia , lookup
Planets beyond Neptune wikipedia , lookup
Astronomy in the medieval Islamic world wikipedia , lookup
Observational astronomy wikipedia , lookup
Rare Earth hypothesis wikipedia , lookup
Astronomical naming conventions wikipedia , lookup
Celestial spheres wikipedia , lookup
Late Heavy Bombardment wikipedia , lookup
Planets in astrology wikipedia , lookup
Tycho Brahe wikipedia , lookup
Planetary system wikipedia , lookup
Satellite system (astronomy) wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Planetary habitability wikipedia , lookup
IAU definition of planet wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
Chinese astronomy wikipedia , lookup
Astronomical unit wikipedia , lookup
Definition of planet wikipedia , lookup
History of astronomy wikipedia , lookup
Extraterrestrial life wikipedia , lookup
Ancient Greek astronomy wikipedia , lookup
Geocentric model wikipedia , lookup
Dialogue Concerning the Two Chief World Systems wikipedia , lookup
De revolutionibus orbium coelestium wikipedia , lookup
The History of Astronomy Part 5 Copernicus Copernicus (1473-1543) Copernicus was a Polish physician, lawyer and astronomer, he questioned the Ptolemaic System. It just didn’t pass the test of “Ockham’s Razor” that “the simplest explanation is usually best.” The Copernican System Copernicus proposed a simple heliocentric system with circular orbits • The planets orbit in the right order (though without Uranus and Neptune). • He even got the relative distances from the sun correct (see chart on page 49). • Moon orbits Earth To avoid religious persecution he published his work “de revolutionibus orbium coelestium” posthumusly. This system explains retrograde motion easily, The Earth was simply passing the by! The lack of observable parallax could be explained with simple geometry. A star far enough away would have a parallax too small to see Recent discoveries had shown that stars might be far enough away (see Tycho) At first Copernicus's Simple Heliocentric model met opposition from great astronomers such as Tycho Brahe . But some agreed, Like: The Astronomer Kepler And the mathematician/philosopher: Rene Descartes A Great Debate ensued Crazy Talk! Thomas Diggs and Giordano Bruno both proposed that: Stars are other Suns and planets may orbit them!