Researchers just announced the discovery of the gravitational wave background. After a 15-year-long study, the scientists have finally “heard” what they were looking for: the gravitational ...

NASA's New Horizons spacecraft, which flew by Pluto in 2015, has offered the best-yet estimates of how dark deep space truly is.

Illustration showing NASA’s New Horizons spacecraft in deep space NASA, APL, SwRI, Serge Brunier (ESO), Marc Postman (STScI), Dan Durda We finally know just how dark it is in deep space.