Across
- 2. The biggest planet.
- 5. Huge mixture of gas , dust, and stars.
- 6. Unidentified flying object.
- 7. Biggest space government agency in the world.
- 8. Number of planets in our galaxy.
- 9. Hot ball of hydrogen and helium.
Down
- 1. An object that moves around a bigger object.
- 3. Earth's natural satellite.
- 4. The star in our solar system.
- 5. Force that draws objects towards another.