the-star-stuff: X-ray “echoes” map a supermassive black hole’s environs Astronomers have found a long-sought X-ray signal from the galaxy NGC 4151 that promises a new way to uncover what’s happening in a black hole’s neighborhood. By NASA’s Goddard Space Flight Center, Greenbelt, Maryland — Published: June 4, 2012 The galaxy NGC 4151 is located about 45 million light-years away toward the constellation Canes Venatici. Activity powered by its central black hole makes NGC 4151 one of the brightest active galaxies in X-rays. Credit: David W. Hogg/Michael R. Blanton/Sloan Digital Sky Survey Collaboration

the-star-stuff:

X-ray “echoes” map a supermassive black hole’s environs

Astronomers have found a long-sought X-ray signal from the galaxy NGC 4151 that promises a new way to uncover what’s happening in a black hole’s neighborhood. By NASA’s Goddard Space Flight Center, Greenbelt, Maryland — Published: June 4, 2012
The galaxy NGC 4151 is located about 45 million light-years away toward the constellation Canes Venatici. Activity powered by its central black hole makes NGC 4151 one of the brightest active galaxies in X-rays. Credit: David W. Hogg/Michael R. Blanton/Sloan Digital Sky Survey Collaboration