Earth in Space

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Across
  1. 1. A gas giant that is the seventh planet in our solar system.
  2. 3. The force that attracts a mass toward another mass.
  3. 4. The scientific study of the movement of the planets.
  4. 6. The regularly repeated path that a planet moves.
  5. 8. A branch of science that looks at planets and space.
  6. 9. To move in a circular orbit around.
Down
  1. 2. A man-made object placed in orbit in orbit around Earth.
  2. 5. To move or cause to move in a circle round an axis or centre.
  3. 7. The third planet in our solar system.