Question

What did Galileo’s observations of Jupiter’s moons help prove?
a.
Geocentrism
b.
Heliocentrism
c.
Kepler’s Laws
d.
Newton’s Laws

Answer 1

Galileo’s observations of Jupiter’s moons helped prove **b. Heliocentrism**. His discovery of the four largest moons of Jupiter (Io, Europa, Ganymede, and Callisto) demonstrated that not everything orbits the Earth, which supported the heliocentric model where planets orbit the Sun.