Across
- 2. Something that we don’t fully understand.
- 5. Machines or tools that help people do things.
- 7. Maybe; something that could be true but is not certain.
- 11. Someone or something that comes from another place.
- 12. A thing that can be seen or touched.
- 13. The sun and everything that moves around it, like planets and asteroids.
- 15. The part of the solar system closer to the sun, including planets like Mercury, Venus, Earth, and Mars.
- 17. The distance that light travels in one year.
- 18. An idea that explains something, based on facts and studies.
- 20. Unusual or unexpected.
- 21. A long trip from one place to another.
Down
- 1. A group of stars and planets that are connected by gravity.
- 3. The speed at which sound travels through air.
- 4. Coming from outside our solar system.
- 6. To find something that was not known before.
- 8. In a way that is unusual or unexpected.
- 9. A rock that moves through space.
- 10. The fastest speed something can reach.
- 14. A vehicle made for traveling in space.
- 16. A scientist who studies objects in space.
- 19. To travel to a new place to learn about it.