Spacewalking astronauts repaired and upgraded the famed Hubble Telescope during five missions from 1993 to 2009. Here's a ...

Webb has two decades ahead of it, but it's already captured some stunning images. Here are 35 of our favorites.

Astronomers have confirmed a wandering black hole, about seven times the mass of the Sun, 5,000 light-years from Earth.

Roughly 100 years ago, American astronomer Edwin Hubble discovered that “spiral nebulae” were actually independent galaxies, located millions of light years away from us. He also figured out that ...

Using data from space telescopes and other instruments, astronomers, cosmologists, and astrophysicists are able to deduce and ...

An astonishing discovery from the James Webb Space Telescope may rewrite our understanding of the Universe’s early years. A ...

The Eagle Nebula, also known as Messier 16, is located about 6,500 light-years from Earth in the constellation Serpens. It is ...

A camera affixed to the International Space Station recently spotted some curious symbols amid a barren desert landscape.

That's over two-and-a-half times larger than the Hubble Space Telescope's mirror, meaning Webb has six times the light-collecting area. Capturing more light allows Webb to see more distant ...

When I was in grade school I was fascinated by the world’s largest telescope: the 200-inch-diameter Hale Reflector on Palomar Mountain near San Diego.

Amid harsh cuts, the Trump administration has proposed canceling the nearly ready-to-launch Nancy Grace Roman Space Telescope ...

The potential discovery of life elsewhere is down to the unprecedented sensitivity of Nasa's James Webb Space Telescope.