Across
- 2. The collection of eight planets and their moons in orbit around the sun.
- 5. To move through the air using wings or an engine.
- 7. To come down and settle on the ground.
- 12. The third planet from the sun.
- 13. To make a journey, typically of some length.
- 15. A building equipped for observing celestial events.
- 17. To enter a vehicle or space.
- 18. Unidentified flying object.
- 20. A celestial object consisting of a nucleus of ice and dust.
- 21. A being from another world.
- 22. To grasp, carry, or support with one's hands.
- 23. To travel on water in a vessel with sails.
- 24. To sit on and control the movement of an animal or vehicle.
- 25. The star at the center of our solar system.
Down
- 1. To leave the ground and begin to fly.
- 3. Rocket - A vehicle designed to travel through space.
- 4. Way - The galaxy that contains our solar system.
- 5. To rest or move on or near the surface of a liquid without sinking.
- 6. A system of millions or billions of stars.
- 8. A person trained to travel in a spacecraft.
- 9. The vast, seemingly infinite expanse beyond Earth's atmosphere.
- 10. A person who operates the flying controls of an aircraft.
- 11. An instrument for observing distant objects.
- 14. A luminous point in the night sky.
- 16. A large spacecraft in orbit where astronauts live and work.
- 19. To leave a vehicle or space.