Solar System

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Across
  1. 1. Half of the Earth (Northern, Southern, Eastern, Western)
  2. 6. A large group of stars held together by gravitation and separated from other groups of stars by large regions of space
  3. 7. The turning of an object on its axis; on complete rotation on an axis causes day and night
  4. 8. A ball of gas in space that produces its own heat and light
Down
  1. 2. A natural satellite that orbits a planet; some plants have no moons; others have over 60 moons
  2. 3. A system of planets and other bodies that orbit a star
  3. 4. The planet on which all known life exists
  4. 5. A large body in space that orbits a star and does not produce its own light