Across
- 3. tilted rotational axis, its faint rings, and its ice giant composition.
- 4. contains 99.86% of the mass of the entire solar system and is a massive star.
- 6. the atmosphere, the hydrosphere, temperature, gravity, and atmospheric pressure
- 7. has a very thick atmosphere
- 9. spins opposite direction of Earth and most other planets.
Down
- 1. has its unique geological features and potential for past liquid water
- 2. It's the fastest planet, zipping around the Sun every 88 Earth days
- 4. is a massive ball made mostly of hydrogen and helium
- 5. is the only planet in our solar system not visible to the naked eye.
- 8. its location in the Kuiper Belt, beyond Neptune, and its unique geological features suggest it may have formed elsewhere in the solar system and then migrated to its current orbit