Across
- 4. - An icy object that, when close to the Sun, displays a visible coma (a fuzzy outline) and a tail.
- 5. - A massive, glowing ball of gas, like our Sun.
- 8. - A natural satellite that orbits a planet.
- 9. - A vast collection of stars, dust, and gas bound together by gravity.
- 11. - A special suit worn by astronauts to keep them safe in space.
- 12. - The universe seen as a well-ordered whole.
- 13. - Anything related to the Moon.
- 17. - The fourth planet from the Sun, known as the Red Planet.
- 18. - A small, rocky object that orbits the Sun, mostly found in the asteroid belt.
- 19. - A large body that orbits a star, such as Earth.
- 20. - An object that orbits a planet, used for communication, observation, or research.
Down
- 1. - A small rock or particle from space that burns up upon entering Earth's atmosphere.
- 2. - The galaxy that contains our solar system.
- 3. - A force that pulls objects toward each other, keeping planets in orbit around the Sun.
- 6. - A tool used to observe distant objects in space.
- 7. - The Sun and all the objects that orbit it, including planets, moons, and comets.
- 10. - A person trained to travel in space.
- 14. - All of space and everything in it, including stars, planets, galaxies, and more.
- 15. - A vehicle used to travel to space.
- 16. - The path one object takes around another object in space.