Question

How does stellar parallax support the heliocentric model?

Answer 1

If Galileo and Copernicus right, it meant that there must be stellar parallax. None was ... It is a huge problem when a consequence of a theory is expected and it cannot be observed. ·

Answer 2

This knowledge led to the most serious and valid challenge to the theory that the earth moved; stellar parallax. They argued that if the earth moved around the sun as Copernicus and Galileo suggested, then there must be some evidence of parallax effects.