Across
- 3. Vehicle used to travel into space
- 5. All of space and everything in it
- 8. Bright object in the night sky
- 9. Path followed by a celestial body around another
- 11. Pertaining to the sun
- 12. Extraterrestrial being from another planet
- 15. Person who travels and explores space
- 16. Huge collection of stars, gas, and dust
- 19. Helmet-wearing space explorer
Down
- 1. Icy object that leaves a trail of gas and dust
- 2. Optical instrument used to observe distant objects in space
- 4. Bowl-shaped hole on the surface of a celestial body
- 6. Cloud of gas and dust in space
- 7. Explosive death of a star
- 10. Vehicle designed for travel in outer space
- 13. Man-made object sent into space to orbit the Earth
- 14. Earth's natural satellite
- 16. Force that attracts objects towards each other
- 17. Bright streak of light in the sky caused by a burning rock
- 18. Heavenly body that orbits the sun