Astronomers have probed the physical environment of repeating X-ray outbursts near monster black holes thanks to data from NASA's NICER (Neutron star Interior Composition Explorer) and other missions.

Astronomers have discovered a likely explanation for a fracture in a huge cosmic "bone" in the Milky Way. Using NASA’s ...

The IAEA built an underground lab to minimize this interference and allow precise measurements. In Monaco, heavily-shielded detectors check for tiny amounts of radioactivity in marine samples ...

A brilliant flash from deep space once baffled scientists. But now, that mystery has been solved—and it reshapes what we know ...

Physicists propose that high-energy photon jets from collapsing stars may be secret factories of heavy elements like ...

In an ejection that would have caused its rotation to slow, a magnetar is depicted losing material into space in this ...

And it had traveled from somewhere far beyond our galaxy.

Now, researchers led by Los Alamos National Laboratory have proposed a bold new idea: that stars collapsing into black holes ...

Understanding the origin of heavy elements on the periodic table is one of the most challenging open problems in all of ...

Cosmic particles with phenomenal energy have puzzled scientists ... During the merger, neutrons are released in large quantities and captured by atomic nuclei. This leads to the formation of unstable ...

Cosmic rays, now more accurately called astroparticles from a physical perspective, are primarily atomic nuclei, without electrons and therefore electrically charged. Almost everything that reaches us ...