A blazar is an active galactic nucleus, essentially a galaxy with a supermassive black hole at its heart, devouring surrounding material and blasting out a jet of plasma at close to the speed of light ...

Everything we see around us, from the ground beneath our feet to the most remote galaxies, is made of matter. For scientists, that has long posed a problem: According to physicists’ best current ...

Add Yahoo as a preferred source to see more of our stories on Google. An artist's concept of multiple types of subatomic particles. (Mark Garlick/Science Photo Library) Forget about turtles; for all ...

A new three-volume study explores how quantum physics, gravitation and cosmology may be understood within a unified ...

Cosmic voids may seem like the emptiest places in the universe, stripped of matter, radiation, and even dark matter. But they’re far from nothing. Even in these vast empty regions, the fundamental ...

The magnum opus of particle physics is far from complete, requiring physicists to devise many alternatives—some weirder than ...