Across
- 4. next stage after main sequence when the average size star expands
- 5. spherical object, gravitational field clears its orbit
- 6. lump of rock that burns up in the earths atmosphere
- 10. when the core of a red giant cools and dims
- 13. when a white dwarf is dead
- 15. when fusion stops in the super red giant
- 16. when a star is stable
- 20. elements up to this formed in average sized stars
- 22. length of life of a massive star
- 24. forms when dust and gas are pulled together by gravity
- 26. natural satellite orbiting a planet
- 27. element formed when hydrogen nuclei fuse
Down
- 1. clouds of dust and hydrogen, birth place of stars
- 2. force that keeps planets in orbit
- 3. lump of rock that enters the earths atmosphere
- 7. theory of how the universe was formed
- 8. formed after a supernova from a smaller core
- 9. spherical object orbiting a star cannot clear its orbit
- 11. when electromagnetic waves moving away from you are stretched
- 12. lump of rock and ice with a large elliptical orbit
- 14. scientists think it makes up most of the universe
- 17. length of life of an average size star
- 18. formed after a supernova from a larger core
- 19. when the force of gravity and temperature of fusion are balanced
- 21. when the protostar has become larger and hotter
- 23. stage after main sequence of a massive star
- 25. elements like this formed in a supernova