Across
- 2. a planet made of mainly hydrogen and helium.
- 6. a small particle of light
- 7. a scientist who studies planets and stars.
- 8. distance that light travels in one year
- 10. a large object made of ice and dust that orbits the sun.
- 12. a planet outside of our solar system
- 14. cloud of dust and gas in space
- 16. pattern formed by a group of stars
- 17. a hollow, bowl shaped cavity caused by an impact
- 19. a rock that burns brightly when it enters Earth’s atmosphere
Down
- 1. an object that is placed into orbit to collect information
- 3. groups of stars that are held together by each other's own gravitational force.
- 4. the closest, neighbouring galaxy to the Milky Way.
- 5. type of matter that does not interact with light
- 9. a large explosion of a star
- 10. another name for the universe; universe as a whole
- 11. A collection of gas, stars, dust held together by gravity
- 13. dark spots on the sun that are temporary; usually only visible through a telescope
- 15. place where light cannot escape
- 18. rocks that orbit around the sun