Across
- 1. A giant ball of hot gas
- 4. A small, rocky body that orbits the Sun
- 7. A group of stars
- 8. A small, icy cosmic body that orbits the Sun
- 9. A giant cloud of dust and gas (mostly hydrogen and helium) in outer space
Down
- 1. Massive, bright star explosion that happens at the end of a star's life
- 2. A large, bowl-shaped hole in the ground
- 3. The nearest major spiral galaxy to our Milky Way
- 5. The spaceflight that successfully landed the first humans on the Moon
- 6. The eighth planet from the sun