Space

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Across
  1. 2. - The second planet from the Sun, often called Earth's twin.
  2. 4. - The tail of this object always points away from the Sun.
  3. 7. - A rocky object that burns up in Earth's atmosphere.
  4. 8. - The largest planet in our solar system.
  5. 9. - The process that powers the Sun.
Down
  1. 1. - The smallest planet in our solar system.
  2. 3. - Small celestial bodies made of rock and metal.
  3. 5. - The planet closest to the Sun.
  4. 6. - The planet known for its rings.
  5. 7. - A natural satellite of Earth.