Across
- 2. Planet, a planet that is composed primarily of silicate rocks
- 6. Ocean planet with solid active surface with mountain valleys and canyons
- 9. The Milky Way is the galaxy that contains our Solar System, with the name describing the galaxy's appearance from Earth
- 10. ice giant mass as fluid mix of water
- 12. planets are much larger than the inner planets and are made primarily of gases and liquids,
- 14. hottest planet that traps heat in a runaway version
- 15. It was the first and the largest Kuiper belt object to be discovered.
- 16. ringed plant the least dense of all the planets
Down
- 1. a giant planet composed mainly of hydrogen and helium
- 3. made of silicate rock and metals
- 4. smallest planet with a solid surface that is covered with craters
- 5. fourth planet from Sun thin atmosphere with surface features
- 7. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
- 8. Planet,
- 11. it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet
- 13. largest planet covered in thick red brown and white clouds