Across
- 3. The third planet from the Sun
- 4. Earth's natural satellite
- 5. A star that suddenly increases in brightness
- 7. Planet famous for its rings
- 8. Once considered the ninth planet
- 11. The largest planet in our solar system
- 16. A tool for observing distant objects in space
- 17. A cloud of gas and dust in space
Down
- 1. The hottest planet in the solar system
- 2. The curved path of a planet around a star
- 4. Known as the Red Planet
- 6. A depression caused by an impact
- 9. The star at the center of our solar system
- 10. A "dirty snowball" that orbits the Sun
- 12. When one celestial body blocks another
- 13. A massive system of stars, gas, and dust
- 14. A highly luminous object powered by a black hole
- 15. A small rocky body orbiting the Sun