avdunstning pålitlighet Kloster built newtons second telescope Analytisk jag hittade det Gris
Second Life Marketplace - Isaac Newton's Telescope (C17th) Georgian tagSteampunk
The Royal Society on X: "Here's one from the Royal Society collections - a reflecting telescope designed and made by Isaac Newton. He built his first version in 1668; this is his
History Of the Telescope - Who Invented the Telescope?
Newton's Second Telescope Photograph by Adam Hart-davis - Pixels