The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

The Messier catalog of deep sky objects was compiled by the comet hunter Charles Messier in the 18th century as a kind of list of "annoying ... we set up a small telescope and binoculars on the roof ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

This was the first working reflecting telescope. Other designers proved unable to grind mirrors with a regular curvature, so the reflector remained largely a curiosity until the mid-18th century ...

The majority opinion among astronomers was that everything our telescopes could see was organized ... It was entry 31 in Charles Messier's 18th century catalog of interesting fuzzy objects ...