Index / Space Objects / Black Hole
Space Objects
Black Hole
Event horizon · escape velocity = c
Predicted by general relativity, confirmed by gravitational waves in 2015 and photographed in 2019. The shadow is 2.6 times the event horizon, ringed by light that has orbited the hole one or more times before reaching us.
Key specifications
M87*
6.5 × 10⁹ M☉
Sgr A*
4.3 × 10⁶ M☉
Schwarzschild R
2 GM / c²
First image
2019 (EHT)
Sheet 007 · Plate 1 of 1 · 1:1 infographic
Click image to enlarge · Esc to close
