The thin haze of intergalactic dust dims and reddens the light from background quasars ... The anomalous arms appear as purple and blue emission. Galaxy NGC5291 (orange, at the center) and ...

While massive youthful stars can produce ionizing radiation, the light has trouble navigating the thickets of gas and dust within the host galaxy. “Not all of it can get outside the galaxy ...

A spiral galaxy like our own glitters in a glorious new picture from NASA's Chandra X-Ray Observatory. The Whirlpool Galaxy — also known as M51 or NGC 5194 — swirls 30 million light-years away ...

A surprising number of dark matter clumps in distant clusters of galaxies severely warp background ... investigate 11 galaxy clusters from about 2.8 billion to 5.6 billion light-years away.

Scientists have combined X-ray data (shown in purple) from NASA's Chandra ... to produce this image of Abell 383, a galaxy cluster 2.3 billion light years away. Abell 383 is 4.84 million light ...