Cygnus X-1 size comparison: how tall is the Cygnus X-1?
Cygnus X-1: 125 km · 78 mi tall · 4.22 × 10³¹ kg
Diameter 125.2 km · 7,200 light-years from Earth · gravity 716,981,132,075.5 m/s² (73,161,340,008 g) · 21.2 times the Sun's mass; first black hole confirmed (1971)
Cygnus X-1 is 125 km · 78 mi tall (4.22 × 10³¹ kg). That is about 73,216× the height of an average man (171 cm). Compare it side by side with people, animals, buildings and more on the board above — drag, zoom, switch cm / ft, or export an image.
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