The journey of astronomical telescopes began in the early 17th century when Galileo Galilei crafted his first refracting ...

How many planets are there? As with the discovery of Uranus, the answer depends on who you ask. Detail from Joseph Wright of ...

The full image includes some 2.5 billion pixels compiled from observations spanning more than 1,000 orbits around Earth ...

A little-known chapter of the Hubble Space Telescope’s history is a reminder of the risks of looking at the sun ...

The magnificent Andromeda galaxy (Messier 31), stands out as the most important nearby stellar island to our Milky Way, and ...

The mighty telescope is expected to see its "first light" by 2028. The frame of the dome that will house the world's largest telescope has been completed, marking another key milestone in the ...

The James Webb Space Telescope has captured a mid-infrared picture of Sagittarius A*, filling in a long-standing gap in ...

"We think every dense, dusty region that we see, and most of the ones we don't see, look like this on the inside — we just ...

Giant ground-based reflector telescopes do much of astronomy's heavy lifting, although the U.S.'s largest in Hawaii is not ...

A team of astronomers sifted through James Webb Space Telescope data from multiple surveys to compile one of the largest ...

Capturing images of individual stars in distant galaxies has generally been considered impossible for decades. But NASA’s ...

The James Webb Space Telescope's Near-Infrared camera (NIRCam) captured stunning imagery of Neptune. It is the "clearest view ...