Across
- 3. - Known for its heart-shaped glacier, once called the ninth planet.
- 4. - Known as the Blue Planet because of its vast oceans.
- 7. - Takes 165 Earth years to orbit the Sun and is windy.
- 8. - Fastest planet, zipping around the Sun in 88 days.
- 9. - This star takes up about 99.8% of the solar system's mass.
Down
- 1. - Has the most moons—79 at last count!
- 2. - Famous for its stunning rings made of ice and rock.
- 5. - Home to the tallest volcano in the solar system.
- 6. - This planet spins backwards and is super hot.
- 8. - Our planet's only natural satellite, moving away each year.