Space

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Across
  1. 2. The study of the universe and its objects.
  2. 4. The celestial body at the center of the solar system.
  3. 5. The force that attracts objects towards each other.
  4. 7. The area beyond the Earth's atmosphere.
Down
  1. 1. A celestial body that orbits around a star.
  2. 3. A celestial body that has enough mass to create and maintain hydrostatic equilibrium.
  3. 6. A spacecraft designed for human space travel.