To explain why dark matter particles haven't come up in any direct detection experiments, physicists have wondered if it may ...

Over time, the dark matter would continue to orbit the black hole and, eventually, collect a dense cloud of dark matter around it. Breaking space news, the latest updates on rocket launches ...

What we experience as gravity is caused by this bending of space-time. This is the main idea of general relativity and was summarised by the American physicist John Wheeler who said: "Matter tells ...

It includes all of space, and all the matter and energy in space. It even includes time, and it includes you too. No one knows the exact size of the Universe because we cannot see the edge!