Physicists have demonstrated with unprecedented accuracy that the speed of light remains constant. In 1887, a landmark physics experiment was carried out by American researchers Michelson and Morley.

Scientists within the JEM-EUSO collaboration are exploiting innovative detector technologies in their quest to observe ultrahigh-energy cosmic rays from space Flying high JEM-EUSO’s Mini-EUSO ...

Gamma-ray bursts, the most powerful kinds of explosions known in the universe, can generate even more energetic light beams than astronomers previously realized, according to a set of new studies. The ...

Astronomers have obtained the first images of X-ray “halos” around the location of a gamma-ray burst. Simon Vaughan of Leicester University in the UK and co-workers used the XMM-Newton observatory to ...

Scientists have created a new class of laser beam that appears to violate long-held laws of light physics. These new beams, which the team calls “spacetime wave packets,” follow different rules of ...

The study of cosmic rays and heliospheric physics bridges our understanding of high‐energy particles from distant astrophysical sources and the dynamic environment shaped by the solar wind and ...

"We thought we had this star figured out, but that's not the case." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. In a record-breaking ...