Across
- 2. - The curved path of a celestial object around a star, planet, or moon.
- 3. - An icy body that releases gas or dust.
- 5. - An instrument used to observe distant objects.
- 7. YEAR - The distance light travels in one year.
- 8. - The second planet from the Sun.
- 10. - A space rock entering Earth's atmosphere, producing a streak of light.
- 14. - Space rock orbiting the Sun.
- 15. - A space telescope launched in 1990.
- 16. HOLE - A region of space where gravity is so strong that nothing can escape.
- 17. - An artificial body placed in orbit around a planet.
- 19. - A highly magnetized rotating neutron star.
- 20. - A planet outside our solar system.
Down
- 1. - A group of stars forming a recognizable pattern.
- 4. WIND - The stream of charged particles released from the Sun.
- 6. - An event where one celestial body moves into the shadow of another.
- 9. - A powerful and luminous stellar explosion.
- 11. - A very luminous and distant active galactic nucleus.
- 12. - The force that attracts objects towards one another.
- 13. - A cloud of gas and dust in space.
- 18. - A massive system of stars, star clusters, and interstellar matter.