There are monstrous objects at the heart of every large galaxy — black holes that are millions or even billions of times more ...

Legendary Star Lacks Evidence for Large Planet Construction Ever since the dawn of human consciousness, skywatchers have been ...

Four-wave mixing A weak optical signal (red) from a spacecraft transmitter can be amplified noise-free when it encounters two pump waves (blue and green) in a receiver on Earth. (Courtesy: Chalmers ...