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1846: Triton, the largest moon of the planet Neptune, is discovered

Willian Lassell discovered Triton on October10, 1846, the largest moon of Neptune, just 17 days after the discovery of Neptune itself by German astronomer Johann Gottfried Galle.

Triton photomosaic from Voyager 2 mission

He had a 24-inch reflector telescope, for which he pioneered the use on an equatorial mount, and he ground and polished the mirror using home made equipment that he constructed.

Lassell is also credited with co-discovering Hyperioin, a moon of Saturn in 1848, and Ariel and Umbriel, two moons of Uranus in 1851.

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Date

Oct 10 2020

Time

All of the day

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