So cosmologists feel confident in modelling the universe using the “maximally symmetric” description of space-time in Einstein’s theory of general relativity. This symmetric vision for the universe, ...

When we gaze up at the night sky, we often marvel at the twinkling stars, distant planets, and expansive galaxies. Yet, beyond the visible spectrum lies a more mysterious aspect of the cosmos—cosmic ...

For the first time, scientists have watched high‑energy cosmic rays at work deep inside a thick cloud of gas, not just at its outer surface. Using the High Altitude Water Cherenkov Observatory (HAWC), ...

A proposed five-satellite Cosmic Positioning System could measure cosmic distances directly and help address discrepancies in the Hubble constant through solar system–scale triangulation.

Ultra-high-energy cosmic radiation as a research area investigates cosmic rays with energies typically above 10¹⁸ eV, focusing on their origins, acceleration mechanisms, propagation through ...

The Cosmic Background Explorer satellite (COBE) went up on a Delta rocket on Nov. 18, 1989, into a polar sun-synchronous ...

Repulsive gravity at the quantum scale would have flattened out inhomogeneities in the early universe First light The cosmic microwave background, as imaged by the European Space Agency’s Planck ...

Scientists have detected a persistent background hum of gravitational waves. This cosmic hum is a new way to explore the universe. It comes from supermassive black hole binaries. This discovery opens ...

The origin of lithium (Li), the third element of the periodic table, has long been shrouded in mystery. This element, commonly found in cosmic rays as two stable isotopes, 6 Li and 7 Li, is crucial to ...

Ben may have been right way back when Stan Lee and Jack Kirby created him and the rest of the Fantastic Four 64 years ago, but we know a heck of a lot more about cosmic rays today. Back then, Grimm, ...