Across
- 2. This planet has the largest mountain in the solar system
- 4. This planet is named after the Roman god of the sea
- 6. This is the smallest planet in the solar system
- 8. This is the hottest planet in the solar system
- 9. This astronomer was persecuted by the Catholic Church
- 10. This event started everything
- 12. This planet is named after the Greek god of the sky
Down
- 1. This celestial body orbits the Sun
- 3. This planet has a radius of 58, 232km
- 5. This planet has kangaroos
- 6. This celestial object is 52, 850 lightyears in radius
- 7. This planet has a radius of 69, 911km
- 8. This was the first man-made object to escape the solar system
- 11. This satellite orbits the Earth every 90 minutes