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The observations made using the European Space Agency's XMM-Newton orbiting X-ray telescope appear to show a white dwarf nearing the point of no return - called the event horizon - as it orbits ...

While there could be other explanations for the mysterious X-ray patterns, such as oscillations in the black hole’s corona, those are less understood. But to confirm their white dwarf hypothesis ...

Using the XMM-Newton X-ray telescope, astronomers have witnessed ... team thinks that a dead stellar core, or white dwarf, daringly teetering on the edge of the black hole is the cause of ...

As it circles closer, the white dwarf moves at a faster rate, which can explain the increasing frequency of X-ray oscillations that the team observed. The white dwarf is practically at the ...