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Researchers, in a recent Physical Review Letters paper, introduce a new mechanism that may finally allow ultralight dark photons to be considered serious candidates for dark matter, with promising ...

The first hydrogen to form absorbed light from the first stars in the universe. Eventually, the universe filled up with stars and galaxies that reionized this hydrogen, allowing photons to travel ...

China’s Large High Altitude Air Shower Observatory (LHAASO)–one of the country’s key national science and technology infrastructure facilities–has found a dozen ultra-high-energy (UHE) cosmic ...

How much light has been emitted by all galaxies since the cosmos began? After all, almost every photon (particle of light) from ultraviolet to far infrared wavelengths ever radiated by all galaxies ...

Astroparticle physics explores the fundamental particles and forces at play in the Universe by studying cosmic messengers—chiefly cosmic rays, neutrinos and high-energy photons—that originate from ...

"Cosmic dawn has been a missing chapter in our understanding of the universe." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Observing the ...