Mystery Object in Space, a Rogue Black Hole? | VIDEO

By Calla Cofield
Space.com
11-19-14

     An object previously thought to be a supernova may actually be a black hole ejected from its home galaxy.

Further observation should provide a definitive answer, but whatever the outcome, the object is unique: If it is a supernova, it's a new breed that radiates for decades, while most supernovas burn out in less than a year. If it's a black hole, it appears to be the product of two black holes that collided, and were simultaneously ejected from their merging parent galaxies.

"This could be a new type of supernova that we've just never seen before. But it would have to be one of the most extreme cases ever observed," said astronomer Michael Koss, who is leading the research. On the other hand, Koss said it could provide all new information about traveling black holes. "Whatever we find, it's exciting." . . .

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Powerful Gamma-Ray Burst 'Hit Earth in 8th Century'

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A gamma ray burst, the most powerful explosion known in the Universe, may have hit the Earth in the 8th Century.

By Rebecca Morelle
www.bbc.co.uk
1-21-13

     In 2012 researchers found evidence that our planet had been struck by a blast of radiation during the Middle Ages, but there was debate over what kind of cosmic event could have caused this.

Now a study suggests it was the result of two black holes or neutron stars merging in our galaxy.

This collision would have hurled out vast amounts of energy.

The research is published in the journal Monthly Notices of the Royal Astronomical Society.

Nature's snapshot

Last year, a team of researchers found that some ancient cedar trees in Japan had an unusual level of a radioactive type of carbon known as carbon-14.

In Antarctica, too, there was a spike in levels of a form of beryllium - beryllium-10 - in the ice.

These isotopes are created when intense radiation hits the atoms in the upper atmosphere, suggesting that a blast of energy had once hit our planet from space.

Using tree rings and ice-core data, researchers were able to pinpoint that this would have occurred between the years AD 774 and AD 775, but the cause of the event was a puzzle.

The possibility of a supernova - an exploding star - was put forward, but then ruled out because the debris from such an event would still be visible in telescopes today.

Another team of US physicists recently published a paper suggesting that an unusually large solar flare from the Sun could have caused the pulse of energy. . . .

* Special Thanks To Andrew Ackerley

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Two Suns? Night To Day? Doomsday? How Will a Near-by Super-Nova Affect Our Planet?

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Two Suns? Twin Stars Could Be Visible From Earth By 2012

By The Huffington Post
1-20-2011

     Earth could be getting a second sun, at least temporarily.

Dr. Brad Carter, Senior Lecturer of Physics at the University of Southern Queensland, outlined the scenario to news.com.au. Betelgeuse, one of the night sky's brightest stars, is losing mass, indicating it is collapsing. It could run out of fuel and go super-nova at any time.

When that happens, for at least a few weeks, we'd see a second sun, Carter says. There may also be no night during that timeframe.

The Star Wars-esque scenario could happen by 2012, Carter says... or it could take longer. The explosion could also cause a neutron star or result in the formation of a black hole 1300 light years from Earth, reports news.com.au.

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