Latest Supermassive black holes Stories
For over 10 years, NASA's Chandra X-ray Observatory has repeatedly observed the Andromeda Galaxy for a combined total of nearly one million seconds.
NASA will hold a media teleconference Wednesday, May 26, at 1 pm EDT, to discuss new results from the Swift satellite's survey of active black holes.
Supermassive black holes with the mass of many millions of stars have been detected at the center of many large galaxies.
Undergraduate student Marianne Heida of the University of Utrecht has found what appears to be a supermassive black hole leaving its home galaxy at high speed.
New evidence from NASA's Chandra X-ray Observatory and ESA's XMM-Newton strengthens the case that two mid-sized black holes exist close to the center of a nearby starburst galaxy.
Black holes are thought to reside at the center of almost every galaxy, with some growing to more than a billion times the mass of the Sun.
Supermassive black holes found at the centers of distant galaxies undergo huge growth spurts as a result of galactic collisions.
Astronomers have come across what appear to be two of the earliest and most primitive supermassive black holes known.
Quasars are active and very powerful black holes at the center of distant galaxies.
Astronomers have found the first clear evidence of a binary quasar within a pair of actively merging galaxies.
Supermassive Black Hole -- A Supermassive black hole is a black hole with a mass in the range of millions or billions solar masses. A supermassive black hole has some interesting properties differing from his low-mass cousins: -- The average density of a supermassive black hole can be very low, and actually can be lower than water's density. This happens because the black hole diameter increases linearly with mass, and consequently density drops much faster. -- Strong tidal...
Seyfert Galaxy -- Seyfert galaxies are spiral or irregular galaxies containing an extremely bright nucleus, most likely caused by a supermassive black hole, that can sometimes outshine the surrounding galaxy. The light from the central nucleus varies in less than a year, which implies that the emitting region must be less than one light year across. They are named for the astronomer Carl Seyfert, who studied them extensively in the 1940s. They are a subclass of active galactic nuclei....
Quasar -- A quasar (from quasi-stellar radio source) is an astronomical object that looks like a star in optical telescopes (i.e. it is a point source), but has a very high redshift. The general consensus is that this high redshift is cosmological, the result of Hubble's law and that their redshift indicates that they are typically very distant from Earth; we observe them as they were several billions of years ago. Since we can see them despite their distance, they must emit more...
- Large; stout; burly.