Gaia BH3

dormant black hole · 33 Suns · the heaviest known that formed from a star in our galaxy

1,926 light-years from Earth

A black hole 33 times the Sun's mass, 1,926 light-years away in Aquila: the heaviest found in our galaxy that was made by a star. It gives off no light; Gaia found it in 2024 from the wobble of an ancient giant star that circles it every 11.6 years.

• event horizon about 195 km across · 33 times the Sun's mass
• its star swings between 4.5 and 28.6 AU from it (the orbit is sped up here)

kind

black hole

size

195 km across (event horizon)