Across
- 2. - The second planet from the Sun, often called Earth's twin.
- 4. - The tail of this object always points away from the Sun.
- 7. - A rocky object that burns up in Earth's atmosphere.
- 8. - The largest planet in our solar system.
- 9. - The process that powers the Sun.
Down
- 1. - The smallest planet in our solar system.
- 3. - Small celestial bodies made of rock and metal.
- 5. - The planet closest to the Sun.
- 6. - The planet known for its rings.
- 7. - A natural satellite of Earth.