Its primary mirror consists of 18 hexagonal segments with a total width of 6.5 meters and a weight of 40 kilograms. For comparison, the Hubble mirror is only 2.4 meters (21 feet and four inches ...

Hubble’s infrared imaging of Sh2-284 unveils stars hidden within dense gas and dust, offering insights into star formation.

They were in charge of building and testing the Hubble’s mirror. It was off by about 2 micrometers. That doesn’t sound like much, but when you are focusing light — especially light from ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

An curved arrow pointing right. The Hubble telescope's replacement – the James Webb space telescope – just had its final mirror installed. The new telescope has been in the works since 1996 ...

Photo: Andromeda nebula plate with Hubble's handwritten circle around the variable star he discovered In 1919 American astronomer Edwin Hubble began work at the Mount Wilson Observatory in ...