Across
- 5. - The star that is in the middle of our solar system orbit.
- 6. small, rocky object that orbits the sun
- 7. - An astronomical object made of bright, glowing matter called plasma. They’re held together by gravity and are incredibly hot.
- 10. - A small body of matter from outer space that enters Earth’s atmosphere and appears like a streak of light.
- 13. Objects made of frozen gases, rock and dust that orbit the Sun.
- 14. The area of air and gas that envelopes Earth and other astronomical objects.
- 15. - An instrument that allows us to see into space.
- 18. A person trained to travel in a spacecraft.
- 19. - A large celestial object that acts as a natural satellite to Earth.
- 20. A group of stars that form a pattern.
Down
- 1. - Everything that exists in space.
- 2. - A piece of rock or metal that lands on Earth’s surface.
- 3. A scientist who studies the universe.
- 4. - A push or pull on an object when it interacts with another.
- 5. - An object intentionally placed into space to orbit a celestial body to collect information.
- 8. - The force that pulls objects towards the ground.
- 9. - When one celestial body blocks light from reaching another by moving between it and its light source.
- 11. - The three-dimensional expanse in which all material things exist.
- 12. - A regular and repeating circuit that one celestial object takes around another.
- 16. - A celestial body that orbits the sun that has sufficient mass for its gravity to overcome rigid body forces and has not cleared the neighbourhood around its orbit.
- 17. - A huge collection of gas, dust and billions of stars and their solar systems held together by gravity.