The age of the Universe is usually presented as a simple number: about 13.8 billion years. It sounds settled, almost tidy.

NASA's James Webb Space Telescope has made its first observations of interstellar comet 3I/ATLAS, revealing that the comet appears to be unusually rich in carbon dioxide.

To celebrate the fourth birthday of the James Webb Space Telescope, NASA has released a stunning image of the strangely shaped galaxy Centaurus A, the site of a cosmic collision 2 billion years ago.

NASA's James Webb Space Telescope has unveiled unprecedented details of Messier 82, revealing millions of stars and star-forming regions previously hidden behind dense cosmic dust.

The NASA James Webb Space Telescope has mapped gas feeding the supermassive black hole in NGC 4696, a galaxy about 145 ...

The James Webb Space Telescope has uncovered six galaxies merging in the early universe, forming a colossal galaxy and fueling the growth of a supermassive black hole.

NASA's Chandra X-ray Observatory has released four stunning images of cosmic wonders, depicted in red, white and blue for the America 250 anniversary on July 4.