On January 7, 1610, the Italian astronomer Galileo discovered three of Jupiter's moons: Callisto, Europa and Io. When he ...
PHILADELPHIA -- Though it looks like a cardboard tube that got left out in the rain, it's a priceless instrument whose owner changed the world. The mottled brown cylinder on display at The Franklin ...
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Why Galileo died in jail for his discoveries
Galileo Galilei is recognized as one of the most important scientists in history. He perfected the first telescopes and his ...
On this date, Jan. 7, 1610, astronomer Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated ...
Hans Lippershey's ingenious spyglass -- Galileo's new window on the heavens -- Johannes Kepler, the nearsighted wizard -- Isaac Newton's reflecting telescope -- William Herschel's giant reflectors -- ...
Humans like to think by analogy, and this method often works well for advancing knowledge. For instance, when Galileo first turned his new telescope towards the heavens in 1609–10, he quickly noted ...
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