In the recent past, space missions dedicated to the study of astrophysical signals in the high-energy spectrum revealed a series of enigmatic excesses not predicted by the theoretical models. In order to find an explanation for these anomalies, many solutions have been proposed. The most exciting hypothesis invokes the contribution […]

Heart of darkness: A view of the accretion disc around the supermassive black hole, with jet-like structures flowing away from the disc. The extreme mass of the black hole bends spacetime, allowing the far side of the accretion disc to be seen as an image above and below the black […]

An artist’s impression of a “string” passing near a black hole. As the string approaches the black hole, it is gradually stretched. Then, as it moves past the black hole, it begins to vibrate. The image to the left, which was captured by the Event Horizon Telescope, represents the shadow […]

ANIMATION Particle physicists use lattice quantum chromodynamics and supercomputers to search for physics beyond the Standard Model. Peer deeper into the heart of the atom than any microscope allows and scientists hypothesize that you will find a rich world of particles popping in and out of the vacuum, decaying into other particles, […]

Photons with an energy of 200 teraelectronvolts are most likely emitted by protons colliding with interstellar gas. The primary source of protons is pulsar HAWC J1825-134 (in the orange circle), the role of the actual accelerator is played by the star cluster [BDS2003] 8 (dark blue). Credit: HAWC For years, […]

Trapped anti-atoms being cooled. Credit: Chukman So The result opens the door to considerably more precise studies of the response of antimatter to light and of how it behaves under the influence of gravity. Swansea University physicists, as leading members of the ALPHA collaboration at CERN, have demonstrated laser cooling of […]

Figure 1. Distribution of the ultra-high-energy gamma rays (yellow points) detected by the Tibet ASγ experiment in the galactic coordinate system. They are obviously concentrated along the galactic disk. The gray shaded area indicates what is outside of the field of view. The background color shows atomic hydrogen distribution in […]

The Cygnus Cocoon region with the source of photons up to 100 TeV, coinciding with the young Cygnus OB2 cluster of massive stars. Credit: IFJ PAN / HAWC At the heart of Cygnus, one of the most beautiful constellations of the summer sky, beats a source of high-energy cosmic ray […]