273 years ago, in 1610:
Galileo sees three of the four "Galilean" moons of Jupiter for the first time through a telescope.
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93 years ago, in 1790:
Caroline Herschel discovers her third comet, Comet C/1790 A1 (Herschel).
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241 years ago, in 1642:
Galileo Galilei dies at age 77 in Arcetri, Grand Duchy of Tuscany, Italy.
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273 years ago, in 1610:
Galileo noticies one of the three "Galilean" moons has disappeared; leading to his belief they were moons.
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96 years ago, in 1787:
William Herschel discovers two moons of Uranus, Oberon and Titania.
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273 years ago, in 1610:
Galileo discovers the fourth "Galilean" moon of Jupiter.
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