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Planets Could Travel Along with Rogue ‘Hypervelocity’ Stars, Spreading Life Throughout the Universe

3 Dec , 2014 by

Back in 1988, astronomer Jack Hills predicted a type of “rogue”star might exist that is not bound to any particular galaxy. These stars, he reasoned, were periodically ejected from their host galaxy by some sort of mechanism to begin traveling through interstellar space. Since that time, astronomers have made numerous discoveries that indicate these rogue, […]

Black Holes, Fermi Bubbles and the Milky Way

6 Mar , 2013 by

Deep at the heart of our galaxy lurks a black hole. This isn’t exciting news, but neither is it a very exciting place. Or is it? While all might be quiet on the western front now, there may be evidence that our galactic center was once home to some pretty impressive activity – activity which […]
Small Magellanic Cloud

Galactic Gong – Milky Way Struck and Still Ringing After 100 Million Years

29 Jun , 2012 by

When galaxies collide, stars are thrown from orbits, spiral arms are stretched and twisted, and now scientists say galaxies ring like a bell long after the cosmic crash. A team of astronomers from the United States and Canada say they have heard echoes of that ringing, possible evidence of a galactic encounter 100 million years […]

Galactic Archaeology: NGC 5907 – The Dragon Clash

23 Feb , 2012 by

[/caption] The sprawling northern constellation of Draco is home to a monumental galactic merger which left a singular spectacle – NGC 5907. Surrounded by an ethereal garment of wispy star trails and currents of stellar material, this spiral galaxy is the survivor of a “clash of the dragons” which may have occurred some 8 to […]
How X-rays Work

Galaxy Bets On A Pair Of Black Holes

2 Sep , 2011 by

[/caption] About 160 million light years away in the constellation of Hydra, spiral galaxy NGC 3393 has been keeping a billion year old secret. It might have a poker face, but it has a pair of black holes up its sleeve… Using information obtained through NASA’s Chandra X-ray Observatory combined with Hubble Space Telescope imaging, […]

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