Across
- 2. - color of the hottest star
- 4. - a measure of how much light a star gives off
- 6. - a ball of hot, glowing gases
- 9. - a group of stars that make a pattern
- 13. - imaginary line around which Earth spins
- 14. - color of the coolest star
- 15. - Earth's axis is _________
- 16. - moon orbits the Earth due to what
- 17. - to make one complete spin on its axis
- 18. year - how long it takes the Earth to make a revolution around the Sun
Down
- 1. - largest stars
- 3. - what is needed to temporarily overcome the force of gravity
- 5. - what star is the source of light on Earth
- 7. - another name for the North Star
- 8. - objects with greater mass have ____________ gravity
- 10. - tool that makes studying patterns of stars easier
- 11. - constellations helped travelers do what
- 12. Dipper - most recognizable constellation