August 23, 2014

Are White Holes Real?

Maggie McKee, PBS NOVA

C.P. Storm

A white whole is, roughly speaking, the opposite of a black hole. “A black hole is a place where you can go in but you can never escape; a white hole is a place where you can leave but you can never go back,” says Caltech physicist Sean Carroll. “Otherwise, [both share] exactly the same mathematics, exactly the same geometry.”

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Tags: White Holes, Black Holes, Wormhole


August 19, 2014
Rarest Type of Black Hole in Nearby Galaxy
Ken Croswell, Physics World
Astronomers in the US have used the flickering of X-rays to pin down the mass of a black hole in the nearby galaxy M82, finding the black hole to be about 400 times as massive as the Sun. This means it is of the rarest,... more ››
August 16, 2014
Why Didn't the Universe Become a Black Hole?
Ethan Siegel, SwaB!
If you knew, from first principles, what the laws of physics were everywhere and at all times in our Universe, that still wouldn’t be enough for you to come up with the prediction that the Universe as we see it ought to... more ››