Across
- 6. – The area around a star where conditions could allow liquid water and life
- 7. – The path an object takes as it moves around another object in space
- 8. – A smaller version of something that shows the same proportions
- 9. – A ring of rocky objects between Mars and Jupiter
- 10. – A large object that orbits a star and is round from its own gravity
Down
- 1. – A region beyond Neptune filled with icy objects and dwarf planets
- 2. – The force that pulls objects toward each other
- 3. – Everything that exists, including all matter, space, energy, and galaxies
- 4. – A huge group of stars, gas, and dust held together by gravity
- 5. – The Sun and all the planets, moons, and other objects that orbit it