Across
- 3. - A bright, shining object in space that produces light and heat.
- 5. - Invisible material that makes up most of the universe’s mass.
- 6. - The energy emitted by stars and other celestial objects.
- 9. - A huge system of stars, dust, and gas held together by gravity.
- 10. - A tool used to observe distant objects in space.
- 13. - The explosion of a star, making it very bright for a short time.
- 15. - Everything that exists, including all galaxies, stars, and planets.
- 16. - The shape of the Milky Way galaxy.
- 18. - A rocky object that orbits the sun, mostly found in the asteroid belt.
- 19. - The power that makes stars shine and move objects in space.
- 20. - The sun and all the objects that orbit around it.
- 22. - The galaxy that contains our solar system.
- 24. - The path a planet or moon takes around a star or planet.
- 25. - A giant cloud of dust and gas where stars are born.
- 28. - The process that powers stars by combining atoms.
- 29. - A person trained to travel and work in space.
Down
- 1. - A large object that orbits a star.
- 2. - A region in space where gravity is so strong that nothing can escape.
- 4. - A natural or artificial object that orbits a planet.
- 7. - A small icy body that releases gas and dust, forming a tail.
- 8. - A streak of light produced when a meteoroid burns up in the atmosphere.
- 9. - The force that pulls objects toward each other.
- 11. - High-energy particles that travel through space at high speeds.
- 12. - The layer of gases surrounding a planet.
- 14. - A spinning neutron star that emits beams of radiation.
- 17. - A large hole on the surface of a planet or moon, caused by an impact.
- 21. - Energy that travels through space in the form of waves or particles.
- 23. - A group of stars or galaxies held together by gravity.
- 26. - A planet that orbits a star outside our solar system.
- 27. - A bright object in space, powered by a supermassive black hole.