I just read about this today in the book Alien Oceans.
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His son, Sir John, actually used it for one of the first photographs ever made. BTW, the word "photograph" (and associated "positive" and "negative"), like "revolution", was originally strictly technical astronomical jargon.
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The Cat's Eye Nebula. I'm so excited for the JWST. My love for astronomy (and science) began with pictures of nebulae in NatGeo in the early 70s.
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I recalled reading about William Herschel. To be accurate, his 40-foot telescope is the remarkable thing I recalled reading about. This depiction was taken from Wikipedia:pic.twitter.com/Q2B50cedEv
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To Hershel, it would have appeared to be a mere smudge of light.
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