Across
- 2. this galaxy has no shape
- 3. this galaxy is a circular egg shape
- 6. this solar system has the Earth in the center
- 7. they are made of gas and are bigger
- 9. the tilt of Earth's axis causes these
- 10. the moons gravitational pull causes these
- 13. we use this to measure outside of our solar system
- 14. the first phase of moon phases
- 16. how bright a star appears
- 18. the hottest layer of the Sun
- 19. a darker cooler area on the Sun
- 20. the distance between the Sun and Earth
- 21. this is a dwarf planet in our solar system
Down
- 1. how bright a star actually is
- 4. they are made of rock and are smaller
- 5. there are 8 of these
- 8. stars are made of this
- 10. the color of a star tells us this
- 11. a giant loop of gas on the Sun
- 12. this solar system has the Sun in the center
- 15. mass and distance affect this
- 17. an explosion on the surface of the Sun
- 18. the outer layer of atmosphere on the Sun