Across
- 2. The heat of the surface of a star or stellar body
- 4. A mass of rock, dust, and metal
- 5. The speed at which an object orbits another body
- 6. a gravitaionally bound system of stars
- 8. A luminous ball of plasma
- 10. The brightness of a star from Earth
- 11. An icy ball of frozen gas
- 12. A superheated expansion of the universe
Down
- 1. A baby star
- 3. The brightness of a star from 10 parsecs away
- 7. A natural satellite
- 9. 90% of a stars life cycle