Mostly used to help older people read ... Building a better refractor The spyglass-turned-telescope had limitations, some of which Galileo was able to design around. To reduce distortions such ...

A little-known chapter of the Hubble Space Telescope’s history is a reminder of the risks of looking at the sun ...

A 40-meter-diameter radio telescope is put into use on Friday in Shigatse, Xizang autonomous region. Built by the Shanghai Astronomical Observatory under the Chinese Academy of Sciences ...