Astronomical terms

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Across
  1. 2. year, the distance that light would travel in a full year
  2. 3. pieces of rock that orbit around the sun
  3. 4. astronomy is the study of stars, planets and space
  4. 7. a measure of a body's brightness
  5. 10. the name given to the system orbiting the sun
Down
  1. 1. a collection of stars , held together by gravit
  2. 3. a person who travels and works in space
  3. 5. are sati kites or planes
  4. 6. our closest star, that provides us with light and heat, and as a result, food and water
  5. 8. belt, a belt of asteroids orbirting the sun that exists mars and Jupiter
  6. 9. hole, a region in space that has an enormous force of gravity that light can not escape
  7. 10. huge spheres of burning gas