Black Hole The Size of 36 Billion Suns Could Lie at The Heart of Cosmic Horseshoe
In 2007, astronomers discovered the Cosmic Horseshoe, a gravitationally lensed system of galaxies about five-and-a-half ...
来自MSN1 个月
Astronomers discover new lensed, dual and projected quasars
More often, such objects are dual quasars ... was thought to be a gravitationally lensed quasar system with the central yellow component acting as the lensing galaxy. However, it turned out ...