Across
- 2. All the space and matter
- 5. Stars that are spread out from the center
- 7. A large group of stars
- 8. a energy through matter/space as electromagnetic
- 9. Solar masses squeezed into a ball, not even light can escape
Down
- 1. Huge group of stars that rotates around, include the Sun and Solar System
- 3. The death of a large star by explosions
- 4. A gas held together by its own gravity
- 5. Travels 300,000 km/sec
- 6. Is mostly full of Hydrogen and Helium