Time to embrace our odd place in the cosmos, inside a huge void?

 作者:柳坚     |      日期:2017-12-22 07:01:15
Tony Rowell/Corbis/Getty Cosmologists normally assume we live in a pretty average part of the universe, but there is growing evidence that this might not be the case. Some think that the Milky Way sits – like some kind of giant, space hillbilly – in a void, an immense region of near emptiness. If true, this might help explain some gaps in our understanding of the cosmos. The universe that emerged from the big bang was exceptionally smooth, but there were tiny ripples in the matter, imprinted by the rapid expansion known as inflation. Over billions of years,