Across
- 2. hydrogen atoms join to form helium
- 3. color of a bigger, brighter star
- 4. energy output from a star
- 5. a ball of hot gas
- 8. large cloud of gas and dust
- 9. a graph of star temp. and brightness
- 12. how bright a star is from Earth
- 13. force that pulls objects together
- 15. amount of matter
- 18. types of energy from the Sun
- 19. type of dwarf star
Down
- 1. an enormous explosion of a star
- 5. a really big bright star
- 6. a huge collection of stars
- 7. sequence of average size stars
- 10. colors of the visible light spectrum
- 11. a contracting cloud of gas and dust
- 14. white dwarf that stops giving off energy
- 16. star left over after a supernova
- 17. shift of light as an object moves away