Across
- 2. - A massive system of stars, gas, dust, and dark matter.
- 7. - An activity in which astronauts leave a spacecraft and float in space.
- 9. - Protective clothing worn by astronauts in space.
- 11. - A luminous celestial object that emits light and heat.
- 13. - A trained space traveler who journeys beyond Earth.
- 14. - The force of attraction between objects in space.
- 16. - An optical instrument used to observe celestial objects.
- 18. - An artificial object placed in orbit around a celestial body.
Down
- 1. - A celestial body that orbits a star.
- 3. - Relating to the Moon or moon-related phenomena.
- 4. - A vast cloud of gas and dust in space.
- 5. - The force that governs the attraction between celestial bodies.
- 6. - Life or phenomena originating from other planets or space.
- 8. - Relating to the Moon or moonlight.
- 9. System - The Sun and its orbiting celestial bodies.
- 10. - A small rock or particle in space.
- 12. - A vehicle designed for space travel and exploration.
- 15. - A celestial object composed of ice, dust, and gas.
- 17. Hole - A region of space with extremely strong gravitational forces.