Inner planets

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Across
  1. 3. the second planet from the Sun and is Earth's closest planetary neighbor.
  2. 6. the third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass.
  3. 9. the smallest planet in our solar system. It's a little bigger than Earth's Moon
  4. 10. The things most inner planets are made from
Down
  1. 1. a planet that is composed primarily of silicate rocks or metals
  2. 2. the natural satellite of the earth, visible (chiefly at night) by reflected light from the sun.
  3. 4. the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
  4. 5. a planet whose orbit lies within the asteroid belt
  5. 7. the thing that all planets orbit
  6. 8. the fourth planet from the Sun and the second-smallest planet in the Solar System