A mysterious cosmic object is sending pulses of radio and X-ray waves to Earth every 44 minutes, leaving astronomers baffled and eager for answers. Astronomers have discovered a cosmic anomaly that’s ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers have ...

What made the pulses puzzling to the astronomers was that they came in the form of both radio waves and X-rays. The discovery marks the first time that such objects, called long-period transients, ...

Scientists have spotted a strange cosmic explosion. This gamma-ray burst repeated several times in a day. Typically, these bursts happen only once when a star dies. NASA's Fermi telescope and the ...

Astronomers have teamed up with citizen scientists to discover a brand-new exploding star that's greedily feeding on a stellar companion. The newly observed binary system features a cataclysmic ...

An unidentified object, which has been named 3I/ATLAS, is traveling through space at 140,000 miles per hour with one expert ...

"This discovery could indicate a new type of physics or new models of stellar evolution." One of the strangest cosmic objects ever seen just got even weirder — NASA's Chandra X-ray telescope caught it ...