At Oak Ridge National Laboratory in Tennessee, a half-dozen workers are making what appear to be gray billiard balls.

An international team of astronomers has uncovered new evidence to explain how pulsing remnants of exploded stars interact ...

An international team of astronomers report the discovery of a long-period radio transient, which is unusually circularly ...

Clean energy from nuclear fusion may soon be commercial. But leaders around the world have done little to prepare.