Across
- 6. light coming from distant stars
- 7. theory that the universe oscillates between Big Bang and Big Crunch
- 8. darkest thing in the universe
- 9. phase in which a star no longer emits light
- 11. star expands and cools and glows red
- 13. stage in which star shines for billions of years
- 14. all of space and time and their contents
- 16. distance light travels in one year
- 18. powerful explosion that may produce a neutron star
- 20. means milky
- 21. shines with white hot light
- 23. earliest stage of a star's life
Down
- 1. space telescope was named after this American astronomer
- 2. 88 are recognized by the IUA
- 3. the Milky Way is this type of galaxy
- 4. theory that the universe will one day stop expanding
- 5. neutron star that emits radio waves in pulses
- 7. most widely accepted theory of the origin of the universe
- 10. the science of the origin and development of the universe
- 12. type of galaxy that has no particular shape
- 15. part of a spiral galaxy
- 17. type of galaxy that is oval shaped
- 19. giant cloud of gas and dust
- 20. is a system of billions of stars together with gas and dust
- 22. brightest thing in the universe