In theory, these scenarios indicate that black holes
are formed when a massive volume of mass exists at a certain spot in space.
Typically, stars will only form black holes
with masses of up to 45 M?.
The black hole
at the center of NGC 3147 is approximately 130 million light-years from Earth.
It was Einstein's theory of general relativity that predicted the formation of black holes
This and the lack of any observed object at that location strongly suggests an intermediate-mass black hole
. By analyzing other anomalous clouds, we hope to expose other quiet black holes
Supermassive black holes
might have grown out of the collapse of the first generation of stars, which would have given birth to 100-solar-mass "seeds." The abundance of early stars means this kind of seed would have been common.
The idea that a plethora of smaller black holes
may surround the "supermassive" hole at the heart of the Milky Way dates back decades.
For around 20 years, astrophysicists have predicted that thousands of smaller black holes
should exist around Sagittarius A* because it is surrounded by enormous halos of gas and dust, which provide a perfect breeding ground for the birth and, ultimately the death, of stars.
are objects of very high density with a gravitational pull so strong that even light cannot escape them.
When the Advanced Laser Interferometer Gravitational-Wave Observatory, LIGO, glimpsed gravitational waves from two merging black holes
, scientists were surprised at how large the black holes
were--about 30 times the mass of the sun (SN: 3/5/16, p.
The newly discovered supersized black hole
resides in the center of a massive elliptical galaxy, NGC 1600, located in a cosmic backwater, a small grouping of 20 or so galaxies, said lead discoverer Chung-Pei Ma, a University of California-Berkeley astronomer and head of the MASSIVE Survey, a research project analyzing vast galaxies and supermassive black holes
in the universe.