Gravity

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Across
  1. 3. the force that attracts a body toward the center of the earth, or toward any other physical body having mass
  2. 4. the amount of matter or substance that makes up an object
  3. 7. a cloud of dust and gas
  4. 8. down
  5. 10. orbit the sun
Down
  1. 1. the collection of eight planets and their moons in orbit around the sun
  2. 2. a broad luminous irregular band of light that stretches completely around the celestial sphere
  3. 4. orbit planets
  4. 5. an amount of space between two things or people
  5. 6. planets orbit this
  6. 9. suggested that a force that pulled objects