Space

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Across
  1. 2. Billions of stars and their solar systems
  2. 4. Study of space
  3. 5. Small rocky objects that orbits the sun
Down
  1. 1. A place in space where the pull of gravity is so strong that even light can't get out
  2. 2. The force that pulls objects towards each other
  3. 3. A star with planets orbiting around that star