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Sagittarius A*
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Sagittarius A*, abbreviated Sgr A*, is the supermassive black hole at the Galactic Center of the Milky Way. Viewed from Earth, it is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, visually close to the Butterfly Cluster (M6) and Lambda Scorpii.
Sagittarius A* imaged by the Event Horizon Telescope, with lines overlaid to mark the orientation of polarization of the magnetic field
Sagittarius A* imaged by the Event Horizon Telescope, with lines overlaid to mark the orientation of polarization of the magnetic field
Dusty cloud G2 passes the supermassive black hole at the center of the Milky Way.
Dusty cloud G2 passes the supermassive black hole at the center of the Milky Way.
An unusually bright X-ray flare from Sgr A* was detected in 2013.
An unusually bright X-ray flare from Sgr A* was detected in 2013.
Supernova remnant ejecta producing planet-forming material seen in radio and X-ray
Supernova remnant ejecta producing planet-forming material seen in radio and X-ray
Supermassive black hole
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A supermassive black hole is the largest type of black hole, with its mass being on the order of hundreds of thousands, or millions to billions, of times the mass of the Sun (M☉). Black holes are a class of astronomical objects that have undergone gravitational collapse, leaving behind spheroidal regions of space from which nothing can escape, including light. Observational evidence indicates that almost every large galaxy has a supermassive black hole at its center. For example, the Milky Way galaxy has a supermassive black hole at its center, corresponding to the radio source Sagittarius A*. Accretion of interstellar gas onto supermassive black holes is the process responsible for powering active galactic nuclei (AGNs) and quasars.
The first direct image of a supermassive black hole, found in the galactic core of Messier 87. This view is somewhat from above, looking down on one o
The first direct image of a supermassive black hole, found in the galactic core of Messier 87. This view is somewhat from above, looking down on one of its galactic jets. Rather than an accretion disc, it shows synchrotron radiation in the microwave range (1.3 mm). This light was emitted by electrons captured in the plasma vortex at the base of a jet. Radiation of this wavelength does not reveal the thermal features thought to dominate the emissions of an
An artist's conception of a supermassive black hole surrounded by an accretion disk and emitting a relativistic jet.
An artist's conception of a supermassive black hole surrounded by an accretion disk and emitting a relativistic jet.
Artist's impression of the huge outflow ejected from the quasar SDSS J1106+1939
Artist's impression of the huge outflow ejected from the quasar SDSS J1106+1939
Artist's illustration of galaxy with jets from a supermassive black hole
Artist's illustration of galaxy with jets from a supermassive black hole