Black hole, cosmic body of extremely intense gravity from which nothing, not even light, can escape. (britannica.com)
Standard theory held that a black hole's intense gravity pulled all that material toward the singularity in the center, where space and time as we knew them came to an end. (discovermagazine.com)
Their idea was to mimic the properties of a cosmological black hole, whose intense gravity bends the surrounding space - time, causing any nearby matter or radiation to follow the warped space - time and spiral inwards. (newscientist.com)