Science vocabulary words

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