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Larissa is a small moon of Neptune discovered in 1989 by the Voyager 2 spacecraft. It matters because studying it helps scientists understand the composition and formation history of Neptune's moon system.
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Larissa, also known as Neptune VII, is the fifth-closest inner satellite of Neptune. It is named after Larissa, a lover of Poseidon (the Greek equivalent of the Roman god Neptune). Larissa is also the eponymous nymph of the city in Thessaly, Greece.
Discovery