Across
- 3. the process of a dying star
- 4. brightest star in the night sky
- 5. stellar core left of a star after it has died
- 7. place in space where gravity pulls so much nothing can get out
- 9. cloud of hydrogen gas
- 10. group of stars that can create a shape
- 11. nebula flattened disk of gas and dust
- 12. measures radiation at regular intervals
- 13. the force between objects and in space
- 14. amount of matter in an object
- 17. colossal explosion of a star
- 19. objects in space that can be made of dust and small ateroids
- 20. tool to show a stars temperature
Down
- 1. matter that does not change unless affected by external force
- 2. how bright an object would be if seen from measured distance
- 6. how bright and object appears in the sky from earth
- 8. two stars that orbit around a center of mass
- 11. the kind of galaxy the milky way is
- 15. ball of ice and dust that orbits the sun
- 16. rocky objects that orbit the sun
- 18. displacement of an object caused by observers view