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d3j (d3jblog@loadaverage.org)'s status on Tuesday, 08-Jan-2019 23:53:50 EST d3j

♲ @BedesBooks@twitter.com: #OnThisDay in 1610, #Galileo Galilei discovered 3 of #Jupiter’s moons, & also wrote 1st letter describing his observations of the #Moon. These discoveries were published in ‘Sidereus Nuncius’, 1st book ever written about discoveries made by telescope. #rarebooks #astronomy #OTD https://loadaverage.org/attachment/4915583

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