Astronomic terms

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Across
  1. 2. an explosion of a small lump of matter that created the universe
  2. 4. a collection of billions of stars held together by gravity
  3. 7. a group of stars that show a pattern or picture in the Sky
  4. 10. study of the stars
  5. 11. an enormous force of gravity that light cannot escape
  6. 12. year the distance that light would travel in a full year
Down
  1. 1. it holds us to the earth
  2. 3. pieces of rock or metal orbiting the earth
  3. 5. a person who travels and works in space
  4. 6. layers of gases surrounding planets amd and other bodies
  5. 8. an amazing light show of magnetic fields by atomic particles from the sun
  6. 9. balls of frozen gas that are in huge orbits around the sun