Gravity and the Universe

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Across
  1. 1. an amount/quantity of something
  2. 4. the largest planet in our solar system
  3. 5. the curved path of a celestial object or spacecraft around a star, planet, or moon
  4. 7. a tendency to do nothing or to remain unchanged
  5. 9. a cloud of gas and dust in outer space
  6. 10. the force that attracts a body toward the center of the earth
Down
  1. 2. a star that had a catastrophic explosion that ejects most of its mass
  2. 3. a famous scientist who first started discussing gravity (His last name)
  3. 6. a measure of the gravitational pull on that certain object
  4. 8. the smallest planet in the solar system