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"content": "#OTD in 1609.\n\nGalileo Galilei demonstrates his first telescope, with a magnification of about 8 or 9, to Venetian lawmakers.\n\nBased only on uncertain descriptions of the first practical telescope which Hans Lippershey tried to patent in the Netherlands in 1608, Galileo made a telescope with about 3x magnification. He published his initial telescopic astronomical observations in March 1610 in a brief treatise entitled Sidereus Nuncius.\n\nhttps://en.wikipedia.org/wiki/Sidereus_Nuncius\n\n#books #astronomy\nhttps://files.mastodon.social/media_attachments/files/113/022/167/570/740/187/original/305c0bedeb959b8c.jpg\nhttps://files.mastodon.social/media_attachments/files/113/022/174/755/493/683/original/c418e9db17585d64.png\n",
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