Across
- 3. Brightness as seen from Earth
- 5. The explosion when a star blazes a lot more
- 8. The distance that light travels in one year
- 10. The first stage of a star
- 11. What scientists do to stars with telescopes
Down
- 1. The actual brightness of a star
- 2. The blue-white core after a star cools
- 4. A group of single stars and star clusters
- 6. All of space and everything in it
- 7. A large cloud of gas and dust
- 9. Figure out