Across
- 3. large, almost round object that moves around the sun, doesn’t have a clean orbit; has other objects such as asteroids and comets
- 6. group of stars that form shapes
- 7. star that explodes or die
- 8. a group of galaxies
- 10. a group of billions of stars united by gravity
- 11. an elliptical, almost circular path
- 12. a ring of frozen celestial objects located beyond Neptune
- 15. force of attraction that an object exerts on others due to its mass
- 16. orbit a star that is not the sun
- 18. the science that studies the universe
- 19. everything that exists in space and time
- 20. brightness of a star
- 21. a yellow dwarf star
Down
- 1. the distance light takes to travel in a year
- 2. a large celestial object that moves around a star
- 4. movement around the sun
- 5. movement around its own axis
- 7. formed by a star and the celestial bodies that orbit around it
- 9. bodies that orbit a planet or a dwarf planet
- 13. theory that proposes the origin of the universe
- 14. measures the force of gravity acting on an object
- 17. measures how much matter an object contains