ASTRONOMICAL TERMS

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Across
  1. 2. pieces of rock or metal that orbit around the sun
  2. 3. the layers of gases that surround many planets and other bodies
  3. 4. a description of direction
  4. 6. a belt of asteroids that orbit the sun
  5. 8. a collision between two objects in space
  6. 9. the study of stars, planets and space
  7. 11. a measure of a body's brightness
Down
  1. 1. a group of stars which appear to form a pattern or picture in the night sky
  2. 2. a person who travels and works in space
  3. 5. huge spheres of burning gas
  4. 7. a region in space that has such an enormous force of gravity that light can not escape
  5. 10. a 24 hour period