Across
- 1. , A massive system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity.
- 3. , The branch of astronomy concerned with the physical nature of stars and other celestial bodies.
- 5. , Energy emitted in the form of waves or particles from celestial objects.
- 7. , The universe seen as a well-ordered whole.
- 10. , All existing matter and space considered as a whole.
- 11. , Unit of length used in astronomical measurements.
- 12. , The curved path of a celestial object around a star or planet.
- 13. , A small rocky body that orbits the Sun.
- 16. , U.S. space agency known for various space missions.
- 17. , The study of the origin and development of the universe.
- 18. , A massive, luminous celestial body.
- 19. , A planet located outside our solar system.
- 22. , A space telescope launched in 1990.
- 23. , Instrument used to magnify distant objects in space.
- 24. , A streak of light produced by a meteoroid entering Earth’s atmosphere.
Down
- 2. , Relating to the Moon.
- 4. , A type of telescope that detects radio waves from space.
- 6. , A facility equipped for observing astronomical events.
- 8. , A unit of distance sometimes used in astronomical measurements.
- 9. , Explosive deaths of stars that outshine entire galaxies.
- 13. , A person trained to travel in space.
- 14. , Relating to the Sun.
- 15. , A vehicle designed for exploring the surface of a planet or moon.
- 20. , A celestial body that orbits a star.
- 21. , Instrument used to observe distant celestial objects.