Science vocabulary words

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Across
  1. 3. the force that causes objects with mass to attract to one another
  2. 6. two objects that have an invisible force of gravity
  3. 8. A bright star that earth and other planets revolve around its also mainly made up of hydrogen and helium
Down
  1. 1. A curved path followed by a satellite as it revolves around an object
  2. 2. A star and a group of planets and celestial bodies that are held together by a gravational atraction
  3. 4. a celestal body that orbits the earth
  4. 5. a large celestial body that revolves around a star in a solar system
  5. 7. Big and small rocks that orbit the sun that have the same material of planets