astronomy

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Across
  1. 3. / proof of the universe is expanding
  2. 6. / the measurement of distance in space
  3. 7. / earths star
  4. 8. / composed of helium and hydrogen
Down
  1. 1. / gas giant
  2. 2. / holds all life
  3. 4. / two stars colliding
  4. 5. / how the universe started