Across
- 1. - dusty snowball with a coma and a tail
- 5. - trans-Neptunian objects that orbit in 2:3 mean-motion resonance with Neptune
- 8. - rocky minor bodywith irregular shapes
- 9. - Pluto's largest moon, almost as large as Pluto itself
- 11. - Where short-periodod comets come from
- 14. - only spaceship to fly by and observe Uranus and Neptune
- 16. - only planet discovered through mathematical calculations
- 17. - Name of the cloud where long-period comets come from
- 18. - objects that around shaped, orbit the Sun, but haven't cleared their orbit
Down
- 2. - parts of asteroids/comets that entered Earth’s atmosphere
- 3. - Galilean moon that is furthest away from its planet
- 4. - once a meteor lands on Earth, it is a...
- 6. - the largest moon in the Solar System
- 7. - planet with an axis tilt larger than 90 degrees
- 10. - only large moon in the solar system that orbits its planet backwards (opposite to the planets rotation)
- 12. - the most volcanically active object in the Solar System
- 13. - “doughnut”-shaped disk beyond Neptune's orbit
- 15. - discovered the 4 most famous moons of Jupiter