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24 Oct 1851
British astronomer William Lassell discovered two of Uranus' moons, Ariel and Umbriel.
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10 Oct 1846
British astronomer William Lassell discovered Neptune's largest moon, Triton.
British astronomer William Lassell discovered two of Uranus' moons, Ariel and Umbriel.
British astronomer William Lassell discovered Neptune's largest moon, Triton.