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What are white holes?

Black holes are created when stars die catastrophically in a supernova. So what in the universe is a white hole?

date51 minutes ago in Astronomy
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Astronomers identify a new mid-size black hole

Nearly all black holes come in one of two sizes: stellar mass black holes that weigh up to a few dozen times the mass of our sun or supermassive black holes ranging from a million to several billion times the sun's mass. ...

dateSep 21, 2015 in Astronomy
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Black hole is 30 times expected size

The central supermassive black hole of a recently discovered galaxy is far larger than should be possible, according to current theories of galactic evolution. New work, carried out by astronomers at Keele University and ...

dateSep 24, 2015 in Astronomy
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11-year cosmic search leads to black hole rethink

One hundred years since Einstein proposed gravitational waves as part of his general theory of relativity, an 11-year search performed with CSIRO's Parkes telescope has failed to detect them, casting doubt on our understanding ...

dateSep 24, 2015 in Astronomy
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