The idea of a white hole as an anti-black hole sometimes gets mentioned, but white holes aren’t real. They are the result of taking the mathematics relativity beyond its usefulness.
On the Edge
A black hole is normally defined in terms of its event horizon, but there are actually different kinds of horizons a black hole can have. This becomes particularly important when dealing with dynamic black holes.
Black Holes No More? Not Quite.
News has spread that Stephen Hawking has declared there are no black holes. That’s not quite what Hawking said. Instead, Hawking proposes a radical new solution to the firewall paradox.
Star Killer
Primordial black holes are hypothetical micro-black holes that some have thought could solve the dark matter problem. New research argues that if such black holes exist they could collide with neutron stars, destroying them. The fact that we haven’t seen any such events further supports the idea that primordial black holes cannot solve the dark matter problem.
Space Detective
A research team studied photographic plates from the Harvard College Observatory. From the plates they were able to gather about 500 historical data points. This allowed them to prove that two supermassive black holes are orbiting each other.
A Short Period
In the center of our galaxy, only 27,000 light years away, lies a supermassive black hole. Some of the strongest evidence of this black hole is the observation of stars closely orbiting it. Recently in Science a new star, S0-102, was announced with an period of 11.5 years.
Point of View
Quasars, blazars, and radio galaxies are all related. It just depends upon your point of view.
More Massive Evidence
Related to my previous post, if you’d like to se an animation of the central S-stars, check out this video.
Massive Evidence
In the center of our galaxy is a supermassive black hole. We can see stars orbiting it, so we know just how massive it is.