The release of the test photo, which NASA casually says is "among the deepest images of the Universe ever taken," almost feels like a flex because it is so good for a throw-away engineering image.

The European Space Agency’s Euclid telescope has shared its first test images, revealing star-filled views of the cosmos. The observatory launched in July.

The James Webb Space Telescope beamed back the latest test pictures of a neighboring satellite galaxy, and the results are stunning when compared with images taken by NASA's previous infrared ...

FGS took the false-color image during a "roll" test, according to a NASA statement about the image. While Webb's near-infrared camera focused on a star dubbed HD147980, the telescope rolled from ...

The National Aeronautics and Space Administration has released a dazzling test image taken by the James Webb Space Telescope in advance of next week’s highly anticipated unveiling of the ...

In another test image, XRISM's Xtend imager captured an X-ray image of Abell 2319, the fifth-brightest galaxy cluster in the sky, located about 770 million light-years away.