Imagine a space telescope with a mirror stretching 50 meters across! That's larger than the width of a U.K. soccer field and ...

On May 20, 1990, the Hubble Space Telescope sent its first image to Earth. This photo turned out to be 50% sharper than ...

Telescope mirrors are sensitive and prone to damage if the proper care isn't taken when cleaning them. It's incredibly important to avoid rubbing them, with your hands or any other surface.

Here at the Mirror Lab, we finished making the first Giant Magellan Telescope segment in 2012. After a pause for work on two other mirrors, the lab is in the process of grinding Segments 2 and 3.

Astronomers want increasingly large telescopes to peer into the depths of space. To build a solid telescope mirror nearly 30 feet across, you need an oven that heats to 2,100 degrees Fahrenheit ...

The telescope’s mirror would be a spinning vat of liquid, topped by a metallic – and thus reflective – liquid. More: Water discovered on sunlit part of the moon for the first time, NASA says.

Here at the Mirror Lab, we finished making the first Giant Magellan Telescope segment in 2012. After a pause for work on two other mirrors, the lab is in the process of grinding Segments 2 and 3.

It was recently announced that construction on the largest telescope mirror ever built is complete. It is a whopping 39 meters across, and it will form a part of an enormous new telescope ...

One of the 18 golden segments of the James Webb Space Telescope’s giant mirror was hit by a micrometeoroid in May, according to an update from NASA.But don’t worry – the space observatory is ...

While the James Webb Space Telescope is almost at its deep space temperature, NASA officials wrote in an update, there's no firm timeline on when it will get cool enough.

For comparison, the European Extremely Large Telescope (ELT), with a 39 meter primary mirror diameter, has an estimated cost for the entire facility and equipment of less than half of that, at ...

Cleaning your telescope's delicate mirrors the wrong way is a sure way to damage them. But it's not hard to use the right materials and get those mirrors clean.