Across
- 2. to observe an object
- 6. first stage of planet formation
- 7. distance light travels in a year
- 8. brightness seen from a fixed point
- 9. what happens when supergiants run out of fuel
- 10. all space and everything in ti
- 12. to figure out
Down
- 1. what is left from a blue-white dwarf
- 3. brightness seen from earth
- 4. group of single stars, stay systems, star clusters, dust, and gas bound by gravity
- 5. the explosion that started the universe
- 11. large cloud of gas and dust