World's smartest dude regrets biggest blunder

Stephen Hawking, the 70 year old greatest living physicist of the universe, has identified his biggest mistake. Only Hawking can get away with saying that, strictly speaking, there are no black holes in our universe.

Do black holes come in size medium?

Black holes can be petite, with masses only about 10 times that of our sun -- or monstrous, boasting the equivalent in mass up to 10 billion suns. Do black holes also come in size medium? NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, is busy scrutinizing a class of black holes that may fall into the proposed medium-sized category.

Black holes don't make a big splash

Throughout our universe, tucked inside galaxies far, far away, giant black holes are pairing up and merging. As the massive bodies dance around each other in close embraces, they send out gravitational waves that ripple space and time themselves, even as the waves pass right through our planet Earth.

Do black holes have hair?

A black hole. A simple and clear concept, at least according to the hypothesis by Roy Kerr, who in 1963 proposed a "clean" black hole model, which is the current theoretical paradigm.

Catching black holes on the fly

NASA's black-hole-hunter spacecraft, the Nuclear Spectroscopic Telescope Array, or NuSTAR, has "bagged" its first 10 supermassive black holes. The mission, which has a mast the length of a school bus, is the first telescope capable of focusing the highest-energy X-ray light into detailed pictures.

Phew: Einstein right about black holes after all

Scientists at the University of York say they've dispelled the so-called firewall paradox which suggests that anything falling into a black hole would be burned up as it crossed the event horizon.

Video: A journey to the limits of space time

Black holes shape the growth and death of the stars around them via powerful gravitational pulses and explosive ejections of energy.

Did cosmic collision flood medieval Earth with gamma rays?

Astronomers believe they've worked out the source of a mysterious burst of gamma rays that irradiated the Earth in the 8th century.

How big are the biggest black holes?

Astronomers have had to come up with a whole new word for black holes that are too big to be described as merely 'supermassive' - and now say there may be a lot more of them around then previously thought.

NASA finds symmetry in black hole jets

Scientists at NASA have discovered a new constant that links different sizes of black holes.

Black holes resemble both liquids and solids

In a new twist to string theory, scientists are suggesting that black holes have properties that resemble the dynamics of both solids and liquids.

Twin black holes surprise scientists

Astronomers are scratching their heads after discovering not one, but two black holes at the center of a globular star cluster - something they didn't think was possible.

WISE spots millions of black holes

NASA's discovered several million new black holes - along with a thousand or so galaxies obscured by dust - using the Wide-field Infrared Survey Explorer (WISE) telescope.

This is how a black hole is fueled

An international research team has managed to observe the active accretion phase of a supermassive black hole in the center of a galaxy tens of millions of light years away.

The biggest black holes prevent star creation

Scientists using the Herschel Space Observatory have discovered that galaxies with the most powerful, active black holes at their heart produce fewer stars.

Black holes expand by eating stars

Most galaxies, including our own Milky Way, feature a supermassive black hole at their center weighing millions to billions of suns. 

But how do those black holes grow so hefty?

Biggest-ever black holes found

Astronomers have discovered the two largest black holes ever - 10 billion times as massive as our own sun - which look set to consume everything within a region five times the size of our solar system.

Black holes have existed since the dawn of time

In an X-ray image looking further into the past than ever before, NASA astronomers have discovered that massive black holes were common in the early universe and grew much more aggressively than previously thought.

Black holes spinning faster and faster

Many giant black holes in the centre of galaxies are spinning faster than at any time in the history of the universe, and may have been set in motion comparatively recently, new research shows.

Spinning black holes could be visible from Earth

It should be possible to spot spinning black holes using ground-based telescopes, says a team of astronomers and physicists, because of their twisting effect on spacetime.