Across
- 2. Also known as the Red Planet, this is the 4th planet from the Sun
- 6. It is the near-vacuum between celestial bodies (planets)
- 7. Someone who is specially trained to travel into outer space
Down
- 1. A group of visible stars that form a pattern when viewed from Earth
- 3. A chunk of rock and metal in outer space that is in orbit around the Sun
- 4. An invisible force that pulls objects toward each other (e.g us and the ground)
- 5. The planet we live on
- 6. A big ball of glowing matter that lights up the night's sky