IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Reflecting telescope made in the ...

It's being called "the world's biggest eye on the sky." Scientists are building the world's largest optical reflecting telescope in Chile, a tool so powerful it will enable man to study ancient ...

1845 In Ireland, William Parsons builds the Leviathan, a reflecting telescope with a mirror that is 6 feet in diameter. He uses it to discover the spiral structure of the nebula M51. 1908 The Hale ...

Construction plans for the largest telescope on Earth remain uncertain, but a possible alternative future for the Thirty Meter Telescope project is beginning to take shape. Plans for the massive ...

In order to be seen, light from objects needs to reach our eyes. Therefore, objects that are far away don’t reflect enough light back for us to see them. The objective lens of a traditional telescope ...

The winter months are fast approaching the Northern Hemisphere -- meaning longer, darker nights longed for by amateur astronomers. To the beginner, setting out on their first tentative steps to ...