Across
- 1. A huge group of millions of stars all clustered together
- 2. The biggest planet in our solar system with a giant red spot
- 3. An imaginary creature that might live on another planet
- 4. A space rock with a long, glowing tail that zooms across the sky
- 6. A brave person who travels and works up in space
Down
- 1. The invisible force that pulls you back down when you jump
- 5. A small rock from space that falls toward Earth