When it comes to telescopes, there are no bigger names than Hubble and Webb, but why have two space telescopes anyway, how ...

Astronomers have achieved a first in exoplanet hunting by using the Hubble Space Telescope images to investigate a mysterious ...

Hubble had a flaw in its mirror called a "spherical aberration." ... Related: The Hubble Telescope is in 'excellent technical condition' on its 35th birthday, its chief scientist says.

A team led by the Italian National Institute for Astrophysics discovered the most distant known fossil galaxy — a relic of ...

The telescope has the world's largest digital camera, which is the size of a small car, weighs 2,800 kg, and boasts a ...

These telescopes represent the cutting edge of astronomical discovery, probing the universe across the electromagnetic ...

Every Hubble anniversary feels like a triumph for the elderly space telescope. It may have a few more anniversaries left in it. NASA hopes it will continue operations into the 2030s. Long live Hubble.

After it first launched, scientists realized that one of Hubble's primary mirrors was ground to the wrong specification. As a result, a daring rescue mission was planned. Astronauts rode to Hubble ...

In June 1990, NASA announced the discovery of a spherical aberration on Hubble's primary mirror due to a 2-micron mistake in the curvature of the telescope's primary mirror — about 1/50 the ...

The actual telescope is made up of 18 hexagonal mirrors made of gold-plated beryllium. Taken together, it has a diameter of 6.5 meters, making it the largest telescope in space.

Readers doubtless know that metals expand when heated. As explained in a NASA blog post that’s a problem for space telescopes ...

How does the camera on the James Webb Space Telescope work and see so far out? – Kieran G., age 12, Minnesota Imagine a ...