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