Across
- 1. A person who studies the universe
- 4. a ball of hot, glowing gases
- 6. The study of the objects in space and their properties
- 8. A galaxy shaped like a flattened globe
- 9. Characteristic that is related to a star’s temperature
Down
- 2. A pinwheel-like galaxy
- 3. A galaxy with no particular shape
- 5. Everything that exists—planets, stars, dust, and gases
- 7. A group of stars, dust, and gases