Astronomy

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Across
  1. 3. a natural luminous body visible in the sky especially at night
  2. 5. a closed-plane curve that results from the intersection of a plane cutting through a cone
  3. 7. to move or shift so as to lean or incline
  4. 10. an event in which a planet's subsolar point passes through its Equator
Down
  1. 1. an invisible force that pulls objects toward each other
  2. 2. a regular, repeating path that one object in space takes around another one
  3. 4. a fundamental change in political organization
  4. 6. one of the four periods of the year (spring, summer, autumn, and winter)
  5. 8. very long-period waves that move through the ocean in response to the forces exerted by the moon and sun
  6. 9. Phases different shapes of the Moon that we see at different times of the month