Which of the following was discovered by Galileo Galilei?
A) The mountains and valleys on the surface of the Moon
B) The planets Uranus and Neptune
C) The planets being in elliptical motion around the Sun
D) The other galaxies in the Universe
Question 2
A(n) _____ is a model of the Universe with the Sun at the center, such as the Copernican universe.
A) geocentric universe
B) concentric universe
C) heliocentric universe
D) eccentric universe