(One particular cosmic ray, detected in 1991 and nicknamed the “Oh-My-God particle,” was going very nearly the speed of light when it smacked into a detector in Utah.) That there are “hot spots” of ...

There are exceptions, certain moments of sudden appreciation when a particular manifestation of light, a transitory glory, appears—a rainbow, a sunset, a pulse of heat lightning in a dark sky ...

For years, astronomers have searched for the origins of ultra-high-energy cosmic rays ... of light-years away, they would gradually slow down due to interactions with cosmic microwave background ...

If you live in a rural location with no light pollution to interfere ... At that time, Venus will appear with far less glare against the background sky, giving your eyes a better opportunity ...

Bright flashes of light filled the night sky of Karachi in the early hours of Monday as people spotted and shared visuals of meteors in the sky. Local social media was flooded with images and ...