Andromeda Central Black Hole

Supermassive black hole

The supermassive black hole at the heart of the Andromeda Galaxy, wrapped in a curious double nucleus of orbiting stars.

Andromeda Central Black Hole, a supermassive black holeComputed render
Computed render: general-relativistic ray-trace; colours mapped to a visible range. Not a photograph.
140.0 million ☉
mass (the Sun = 1)
2.76 AU
event-horizon radius (computed)
2.5 million ly
from Earth

Mass is a best estimate from the cited observations, which carry their own measurement uncertainty.

Its event horizon, the edge past which nothing returns, spans about 2.76 AU in radius.

It anchors
Andromeda Galaxy
Spiral galaxy, 2.5 million ly away.
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Black holes of similar mass
Bode's Galaxy Central Black HoleSupermassive70.0 million ☉Centaurus A Central Black HoleSupermassive55.0 million ☉Messier 106 Central Black HoleSupermassive39.0 million ☉Sombrero Central Black HoleSupermassive1.0 billion ☉Sgr A*Supermassive4.3 million ☉M87*Supermassive6.5 billion ☉
Worlds in the same direction on the sky→
Source: Curated from public catalogs via Wikidata (CC0). See data & analysis for full sourcing.
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