Across
- 3. Path of a celestial body around another
- 6. Force that attracts objects toward one another
- 8. Object that orbits a planet
- 9. Relating to the Moon
- 10. Event where one celestial body blocks another
- 12. Known as the Red Planet
- 16. NASA rover exploring Mars since 2021
- 19. Explosion marking the death of a massive star
Down
- 1. Person trained to travel in space
- 2. Russian term for astronaut
- 4. Robot that explores planetary surfaces
- 5. NASA program that landed humans on the Moon
- 7. Tool used to observe distant stars and galaxies
- 8. Company aiming to make space travel more accessible
- 11. International Space Station, a habitable satellite
- 13. Cloud of gas and dust in space
- 14. Rocky body orbiting the Sun, smaller than a planet
- 15. Large system of stars, gas, and dust
- 17. Earth's "sister" planet
- 18. Ice and dust body with a glowing tail when near the Sun