The Universe

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