sgr a

Object “G2″ Still Intact at Closest Approach to Galactic Center, Astronomers Report

by Nancy Atkinson May 2, 2014

The latest observations by the Keck Observatory in Hawaii show that the gas cloud called “G2” was surprisingly still intact, even during its closest approach to the supermassive black hole at the center of our Milky Way galaxy. Astronomers from the UCLA Galactic Center Group reported today that observations obtained on March 19 and 20, […]

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Best Evidence Yet for a High-Energy Jet Emanating from the Milky Way’s Black Hole

by Nancy Atkinson November 20, 2013

Jets of high energy particles emanating from a black hole have been detected plenty of times before, but in other galaxies, that is — not from the supermassive black hole at the center of the Milky Way, known as Sagittarius A* (Sgr A*). Previous studies and other evidence suggested that perhaps there were jets – […]

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Sgr A* Could Be a Relic of a Powerful AGN

by Shannon Hall November 13, 2013

The early universe was sizzling with active galactic nuclei (AGN) — intensely luminous cores powered by supermassive black holes — most of which could outshine their entire host galaxies and be seen across the observable universe. While our central supermassive black hole Sgr A* lies rather dormant at the moment, new evidence suggests that it too […]

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Our Galaxy’s Supermassive Black Hole is a Sloppy Eater

by Jason Major August 29, 2013

Like most galaxies, our Milky Way has a dark monster in its middle: an enormous black hole with the mass of 4 million Suns inexorably dragging in anything that comes near. But even at this scale, a supermassive black hole like Sgr A* doesn’t actually consume everything that it gets its gravitational claws on — […]

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How do Hypervelocity Stars End up Breaking The Speed Limit?

by Shannon Hall June 4, 2013

The Sun is racing through the Galaxy at a speed that is 30 times greater than a space shuttle in orbit (clocking in at 220 km/s with respect to the galactic center). Most stars within the Milky Way travel at a relatively similar speed. But certain stars are definitely breaking the stellar speed limit. About […]

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