Early Astronomers

Who first believed in a geocentric solar system?

Who developed the law of gravitational force?

Who studied the speed of light and developed a theory that the laws of physics apply everywhere in space?

A massive object generates a gravitational field by warping the geometry of the surrounding spacetime.

What is a heliocentric solar system?

Early astronomers used this device before the telescope to take measurements of objects in the night's sky

Who first observed the craters of the moon using a telescope?

Who first discovered planets orbit shapes are elliptical?