Planets and Gravity Crossword Puzzle

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Across
  1. 1. a round shape or figure
  2. 4. circular; curved in shape or stature
  3. 5. a word Einstein uses in one of his famous theories about gravity
  4. 6. molecules sticking/being attracted to each other
Down
  1. 1. the flattest planet in our solar system
  2. 2. a force that attracts objects toward one another
  3. 3. a body/mass that moves in an orbit around a star
  4. 7. a star located roughly in the center of our solar system