Gamma radiation cannot travel very far in ... density is higher than the galactic average in the galactic center, for example, suggesting a source of freshly accelerated protons in the region.

"The gamma-ray burst traveled through intergalactic space at the speed of light for eleven billion years, during which time the Sun and the planets were born." — Timothy Ferris, in the film ...

Jamie Carter is an award-winning reporter who covers the night sky. A massive burst of gamma rays produced by the explosion of a star almost two billion light-years away was so powerful that it ...

Scientists have long known that thunderstorms can produce gamma rays, extremely high-energy light that is more often associated with astrophysical phenomena, such as exploding stars and matter ...

An international research team co-led by Los Alamos National Laboratory observed ultrahigh-energy gamma rays at more than 100 teraelectron volts, tracking their origin to the galactic center for ...

An isotope emits gamma rays that easily pass through the body to a detector outside the body, for example a ‘gamma camera’. In this way, the radioactive isotope can be followed as it flows ...

We use this property of radiation to kill cancer cells as well as harmful bacteria and other micro-organisms. Alpha, beta and gamma radiations are all examples of ionising radiations. Alpha ...

An observatory high in the mountains of Mexico has recorded repeated emission of some of the highest-energy gamma rays ever recorded from a single point close to the galactic center. The nature of ...