Space and Gravity

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Across
  1. 3. Closest planet to the Sun
  2. 7. A famous scientist that first began discussing gravity
  3. 8. Gravity is affected by this main factor
  4. 9. Has the biggest rings in our solar system
Down
  1. 1. The planet we live on
  2. 2. Strongest gravitational force by a planet in our solar system
  3. 3. Is measured on how much matter the object is made of
  4. 4. A force that pulls objects towards each other
  5. 5. The hottest planet in our solar system
  6. 6. Is measured on how much gravitational pull on that object
  7. 8. All the planets in our solar system orbits around this thing