Observatories in Chile’s Atacama Desert, including the world’s largest optical telescope, could be blinded by light pollution ...

The European Southern Observatory's (ESO) Extremely Large Telescope (ELT) — the world's largest visible- and infrared-light ...

Dozens of boxes holding mirrors are placed along a remote desert hill in northern Chile as workers make progress in the ...

The unobstructed skies that gave Big Sky, Montana its name made for an appropriate setting for the release of two postage ...

"The operations work at STScI, NASA's Goddard Space Flight Center, and other NASA contractors is funded by the operational ...

Astronomers are sounding alarm bells as the world's most precious sky-observing location faces a risk of being blinded by ...

When fully assembled, M1 will be the largest mirror ever built for an optical telescope. Breaking space news, the latest updates on rocket launches, skywatching events and more!

When fully assembled, M1 will be the largest mirror ever built for an optical telescope. The inner frame of ESO's Extremely Large Telescope (ELT) which will support all five mirrors of the ELT ...

New U.S. Postal Service stamps released last week feature images captured by NASA's James Webb Space Telescope.

Astronomers sound the alarm as a proposed renewable hydrogen project in Chile threatens to disrupt the pristine night skies ...