Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

In January 2019, researchers detected gamma-ray burst (GRB) 190114C. They caught this quick explosion right in the act and observed the most energetic photons ever seen from a gamma-ray burst. This ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

An experiment on the side of an extinct volcano in Mexico involving gamma rays is helping scientists answer a fundamental question in physics: Is the speed of light the same throughout the universe?

Smaller dots, Georges, please. In their efforts to unify quantum theory and gravity, theoretical physicists have likened spacetime to a Georges Seurat painting, composed of tiny dots or lumps that ...

In 2019, the MAGIC telescopes detected the first Gamma Ray Burst at very high energies. This was the most intense gamma-radiation ever obtained from such a cosmic object. But the GRB data have more to ...

Scientists studying radiation from a distant gamma-ray burst have found that the speed of light does not vary with wavelength down to distance scales below that of the Planck length. They say that ...

Sept. 24 (UPI) --A new model of gamma ray bursts suggests the blasts that trigger the cosmic phenomena may travel faster than the speed of light within surrounding gas clouds. The creators of the new ...

Racing across the universe for the last 7.3 billion years, two gamma-ray photons arrived at NASA’s orbiting Fermi Gamma-ray Space Telescope within nine-tenths of a second of one another. The dead-heat ...