Across
- 3. A journey into space with a particular goal.
- 4. The path followed by a planet, moon, or satellite around another object.
- 5. A space traveller from another world.
- 7. A protective layer of gases surrounding a planet.
- 13. A large object that travels around a star.
- 14. A glowing object in the sky that produces its own light.
- 16. A piece of rock or metal from space that reaches the ground.
- 18. The force that pulls objects toward planets and other large bodies.
- 19. A deep, bowl-shaped hole found on the surface of the Moon.
- 20. A device used to observe objects that are very far away.
Down
- 1. A vehicle designed to travel through space.
- 2. A scientist who studies objects and events beyond Earth.
- 6. The moment a rocket leaves the ground and begins its journey.
- 8. A rocky object that travels through space and can enter Earth's atmosphere.
- 9. A person who travels to discover places they have never been before.
- 10. A huge system containing stars, planets, gas, and dust.
- 11. A large body in space that has enough gravity to become roughly round and travels around a star.
- 12. A human-made object that travels around Earth or another planet.
- 15. Everything that exists, including all space, stars, planets, and galaxies.
- 17. A powerful machine that carries spacecraft away from Earth.