Astronomers have traced a mysterious blast of X-rays to a star that, like a cosmic action hero, just refused to die.

Now, let’s take a closer look at X-rays. This technology has been around much longer than MRI. It dates back to the late 1800s. For quite some time, it was the only non-invasive way for doctors to ...

A new analysis of BL Lacertae by NASA’s Imaging X-ray Polarimetry Explorer sheds light on the emission mechanisms of active ...

An international team of astrophysicists have uncovered a possible origin of fast X-ray transients (FXTs) — mysterious, ...

What new methods can be developed in the search for extraterrestrial intelligence (SETI)? This is what a recent white paper ...

Since their discovery by Wilhelm Roentgen in 1895, X-rays have become a staple of modern medical care, from imaging teeth and ...

The discovery marks the most distant mini halo ever found, doubling the distance of any previously known example. It offers ...

A microquasar belonging to our Milky Way galaxy has set records by generating cosmic rays with energy levels never before ...

Solar flares can reshape exoplanet atmospheres within days, affecting temperature, winds, and potential habitability.

The High Energy Astrophysics Division's main focus is on X-ray astronomy via observations of high-energy sources with instruments aboard satellites, rockets, balloons, and the Space Shuttle. The ...

Ultra-high energy cosmic rays, which emerge in extreme astrophysical environments—like the roiling environments near black holes and neutron stars—have far more energy than the energetic particles ...