kepler's law of planetary motion

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Across
  1. 1. — Shape of planetary orbits (oval)
  2. 6. — Point in orbit closest to the Sun
  3. 8. — Imaginary line joining planet and Sun
  4. 9. — Farthest point of a planet from the Sun
  5. 10. Law — Kepler’s law of equal areas in equal times
Down
  1. 2. Not a perfect circle, but slightly stretched path of a planet
  2. 3. — Central body around which planets revolve
  3. 4. — Time taken for one complete revolution
  4. 5. — Scientist who proposed three laws of planetary motion
  5. 7. Force that keeps planets in orbit (discovered by Isaac Newton)