31 DEC. 2003
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1787: On 11 January 1787, Sir William Herschel discovered Titania, the first moon of Uranus. Six years earlier, he had discovered the planet.
Titania's diameter is 1610 kilometres and its distance from Uranus is 436 300 kilometres.
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7 January
1610: On 7 January 1610, Galileo wrote his first letter describing telescopic observations.
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