okt 062013
 
Runaway Binary Stars are Leaving the Galaxy

  CfA astronomers made a remarkable and fortuitous discovery in 2005: an extremely fast moving star, clocked going over three million kilometers an hour. It appears to have been ejected from the vicinity of the galactic center’s supermassive black hole around 80 million years ago by powerful gravitational effects as it swung past the black [continue reading]

mei 012012
 
Rogue stars ejected from the galaxy found in intergalactic space

  It’s very difficult to kick a star out of the galaxy. In fact, the primary mechanism that astronomers have come up with that can give a star the two-million-plus mile-per-hour kick it takes requires a close encounter with the supermassive black hole at the galaxy’s core. Rogue star is ejected from the galaxy by [continue reading]

apr 022012
 
Black Holes Grow... By Eating Binary Star Partners

A study led by a University of Utah astrophysicist found a new explanation for the growth of supermassive black holes in the center of most galaxies: they repeatedly capture and swallow single stars from pairs of stars that wander too close. Artist’s conception of a supermassive black hole (lower left) with its tremendous gravity capturing [continue reading]