Across
- 2. One full trip a planet makes around the Sun
- 3. A huge group of stars, dust, and gas held together by gravity
- 7. One full spin of a planet on its axis
- 11. A natural object that orbits a planet
- 12. The area beyond Earth’s atmosphere
- 13. The rise and fall of ocean water caused by the Moon’s gravity
- 15. A spacecraft that explores space without people on board
- 18. The path one object takes around another in space
- 19. A space rock that burns in Earth’s atmosphere
- 20. When one space object blocks light from another
- 24. Another word for the universe
- 27. An object that orbits a planet; can be natural or man-made
- 28. The star at the center of our solar system
- 29. The force that pulls objects toward each other
- 30. The distance light travels in one year
Down
- 1. A cloud of gas and dust in space where stars are born
- 4. The imaginary line Earth spins around
- 5. A space object made of ice and dust with a glowing tail
- 6. Relating to the Sun
- 8. A tool used to see things far away in space
- 9. Everything in space, including all stars and galaxies
- 10. When a spacecraft is sent into space
- 14. A bowl-shaped hole on the surface of a planet or moon
- 16. A rocky object that orbits the Sun, smaller than a planet
- 17. A giant ball of hot gas that gives off light and heat
- 21. A large object that orbits a star like the Sun
- 22. A person trained to travel in space
- 23. A place in space with gravity so strong not even light can escape
- 25. Way The galaxy that includes our solar system
- 26. Relating to the Moon