Circular Motion People

Anaxagoras

Suggested the sun was actually a very large, hot rock high in the sky

Aristarchos

Observations of lunar eclipses led to the suggestion of a heliocentric universe

Tycho Brahe

Got his nose cut off in a sword fight over who was the best mathematician

Henry Cavendish

Measured the value of G, the gravitational constant

Nicholas Copernicus

Dedicated his work to Pope Paul III

Eratosthenes

Calculated the circumference of the Earth using shadow angles in June

Galileo Galilei

Discovered 4 moons orbiting Jupiter

Johannes Kepler

Derived the laws of planetary motion

Hans Lippershey

Invented the first telescope

Martin Luther

Said belief in a heliocentric universe was heresy

Isaac Newton

Derived 3 laws of motion and a gravitational constant

Claudius Ptolemy

Wrote The Almagest, a very accurate but complicated geocentric model

Anaxagoras

Was prosecuted by Cleon for "impiety" and permanently exiled for the crime

Aristarchos

His heliocentric ideas were dismissed as the rambling words of an otherwise harmless old man

Tycho Brahe

A great observational astronomer, but a very poor theorist

Nicholas Copernicus

Devised a complicated, comparatively inaccurate heliocentric model of the universe

Galileo Galilei

Taught both heliocentric and geocentric theories at the University in Padua

Eratosthenes

Assumed rays from a very large sun, very far from a very small earth would occur parallel to one another

Claudius Ptolemy

Devised a geocentric model of the universe that allowed sailors to successfully navigate the seas for over 1500 years

Johannes Kepler

Using the orbit of Mars, decided planets orbited in ellipses, not circles