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Vanishing matter points to black hole in Milky Way

Vanishing matter points to black hole in Milky Way

作者:晋姣购  时间:2019-03-08 02:16:12  人气:

By David Shiga MATTER and energy are vanishing without a trace at the centre of the Milky Way, providing the best evidence so far that a black hole is lurking there. Falling into a black hole is a one-way trip – once matter or light crosses a threshold called the event horizon, it can never escape. While astronomers have identified many dark, dense objects they strongly suspect are black holes, it is difficult to prove that they possess event horizons, the defining feature of such objects. Among the proposed alternatives are dense balls of exotic matter called boson stars,