Describe 3 reason ancient astronomers used the movement of the skies

Explanation:

Ancient astronomers used the movement of the skies:

1. To track and find out the why's about the movement of our planet and others

2. To come up with systems ex. Egyptions used their monitoring of the celestial bodies to come up with a calendar system, in which they also used it to predict the nile river floodings

3. Religious purposes ex. ancient mayans studied the movement of the skies for their own religion sakes, ex. annual sacrificing of humans blood to their gods

it's a b and

explanation:

wheres the pic