Across
- 5. term that describes the motion of one object as it moves around another
- 6. a stretched-out circle
- 8. an attractive force that exists between all objects that have mass
- 9. Sun and the other planets revolved around the Earth
- 11. the relative position of something or someone
- 12. the first to use the telescope for astronomical studies
- 15. an imaginary line about which each planet or moon spins
- 16. the meridian that begins the time zones
Down
- 1. an object that orbits a star
- 2. the Earth and other planets revolve around the Sun
- 3. the motion of a spinning object
- 4. Renaissance polymath alive from 1473 to 1543
- 7. The measure of how far an object’s orbit is from being circular
- 10. published by Claudius Ptolemy in Greece in 150 AC
- 13. the amount of time it takes a planet to complete one full rotation
- 14. the path an object takes as it revolves around another object