Hans Lippershey invents the refracting telescope, which Galileo Galilei soon puts to use. (may 1, 1608 – oct 1, 1608)
Description:
In 1608, Dutch telescope manufacturer Hans Lippershey created the first refracting telescope. It was made up of a convex and concave lens inside of a tube, and when used together, these two lenses magnified the original object three or four times.source: https://www.loc.gov/collections/finding-our-place-in-the-cosmos-with-carl-sagan/articles-and-essays/modeling-the-cosmos/galileo-and-the-telescope/
Added to timeline:
Date:
may 1, 1608
oct 1, 1608
~ 5 months and 3 days