By comparing infrared and X-ray background signals across the same stretch of sky, an international team of astronomers has discovered evidence of a significant number of black holes that accompanied the first stars in the universe.
The creation of new black holes was thought to be unnoticable in most cases, at least with currently available technology on Earth. But a new theory predicts that most of these invisible events could actually be detectable when looking for the right signs.
By coincidence, astronomers noticed a black hole as it "woke up" from a decades-long slumber to feed on giant planet that approached too close.
Black holes are growing faster than previously thought possible, which includes the black hole in our own Milky Way Galaxy, according to an astronomical study published this week in the Astrophysical Journal.
A highly distorted supernova remnant shown in the image below may contain the most recent black hole formed in the Milky Way galaxy. The image combines X-rays from NASA's Chandra X-ray Observatory in blue and green, radio data from the NSF's Very Large Array in pink, and infrared data from Caltech's...
A special new view of spiral galaxy IC 342 showing two unusually radiant black holes was made possible by NASA's new X-ray telescope NuSTAR, standing for Nuclear Spectroscopic Telescope Array. The high-energy X-ray data from NuSTAR have been translated to the color magenta, and superimposed on a vis...
There will be some cosmic fireworks in 2013, like one of the potentially brightest comets in decades. The comet known as C/2012 S1 (or ISON), was first discovered in September, and is expected to outshine even the moon and be visible at day at its peak.