Astronomy Vocabulary

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Across
  1. 3. radiation A radiant energy that creates electromagnetic energy
  2. 4. the rising and falling of the sea
  3. 6. two or more objects orbiting each other and have a center mass
  4. 7. the study of the universe
  5. 8. to divide or split somethings into more than two parts
  6. 9. phases different appearances of the moon seen from earth
Down
  1. 1. 3 laws that describe the motion of the planets across the sky
  2. 2. the action of rotating around an axis
  3. 5. the periodic variation of the incline of the axis on a rotating object
  4. 8. the result of joining two or more things together to make one thing