Using the Einstein Probe (EP), astronomers have detected a new X-ray transient event, which turned out to be an X-ray flare ...

A rare interstellar comet has been caught in X-rays by two space telescopes, revealing how its gases interact with charged particles from the sun as it travels through the inner solar system.

New observations reveal that the relationship between ultraviolet and X-ray light in quasars has changed over billions of ...

The mystery of strangely blinking objects scattered throughout the Milky Way just deepened. Something 15,000 light-years away from the Sun isn't just slowly, methodically beaming out radio waves – ...

A series of five new images from NASA’s Chandra X-ray Observatory show the beauty of space as seen in the X-ray wavelength. Data from Chandra has been combined with data from other telescopes ...

LOS ANGELES -- A glowing supernova remnant, a nebula shaped like a cat's paw and the iconic "Pillars of Creation" are just a few of the celestial objects that shine in 25 never-before-seen images ...

The European Space Agency's X-ray space observatory XMM-Newton observed interstellar comet 3I/ATLAS on 3 December for around 20 hours. During that time, the comet was about 282–285 million km from the ...

Astronomers have mapped out half the universe in X-ray light, using a space telescope called eROSITA. The new map, which contains almost a million X-ray sources, is the basis of dozens of new ...

Editor’s Note: Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Along for the ride is JAXA’s SLIM, or ...