Across
- 2. A giant interstellar cloud of gas and dust.
- 9. Energy transmitted as waves or particles.
- 11. Space rock burning up in an atmosphere.
- 12. The layer of gases surrounding a planet.
- 17. A small, rocky object orbiting the Sun.
- 18. A recognisable pattern of stars.
- 19. A luminous ball of gas powered by fusion.
- 20. The curved path of an object around a celestial body.
- 22. A colourless gas found on some planets/moons.
- 24. Shaped like a flattened circle or oval.
- 25. A regular or repeating arrangement.
- 26. A group of related parts working together.
Down
- 1. The lightest element and primary fuel for stars.
- 3. The distance light travels in one year.
- 4. The scientific study of space and stars.
- 5. All of space, time, matter, and energy.
- 6. The imaginary line an object rotates around.
- 7. The force of attraction between two masses.
- 8. diagram: A drawing with sizes proportionally reduced or enlarged.
- 10. An unmanned spacecraft used for research.
- 13. A large, round object that orbits a star.
- 14. An icy body that develops a tail near the Sun.
- 15. dust: Tiny particles of matter in space.
- 16. A massive system of stars, gas, and dust.
- 19. A natural or artificial object orbiting a planet.
- 21. A reusable spacecraft for transport.
- 23. One celestial body blocking light from another.