Metis

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Metis (Jupiter XVI) The innermost of the known jovian planets, discovered in 1979. It orbits inside the main ring of Jupiter (it is a moom); it and Adrastea may be the source of the material comprising the ring. Metis has a diameter of 40 (±20) km; mass 9.56 × 1016 kg; mean distance from Jupiter 128 000 km.

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