But the 40-inch (1 meter) glass lens at Yerkes was soon made obsolete by larger mirrors. The Hooker 100-inch (2.5 m) reflecting telescope opened in 1917 at Mount Wilson Observatory in Pasadena, Calif.

While there are several stories behind how the telescope came to be, the most settled upon one involves Dutch glassmaker Hans Lippershey in the 17th century (via Space.com).Glassmakers had been ...

He learnt how to grind lenses, and all the other necessary skills, and soon made an eight-power telescope (that would make the image eight times larger) and a 20-power telescope.

Ask your friends and neighbors, and most will probably tell you that it was the 17th century scientist Galileo who invented the telescope. This just isn’t so.

NASA has just released a new documentary about the most powerful space telescope ever built, and you can watch it now.

On October 2, 1608, Hans Lippershey demonstrated a new invention – the first optical refracting telescope. A.S.Ganesh turns his telescope to view back in time… nearly 410 years to that day.

For space fans, June has something extra to enjoy, as NASA recently released “Cosmic Dawn,” a new “intimate access” ...

alvan clark passes away the famous telescope maker dead.; sketch of the man who made the largest telescopes in the world after being a painter. share full article. aug. 20, 1887.