Cygnus X-1 Black Hole

Cygnus X-1

The star indicated in the image is HD226868 and is a blue super giant and is thought to have a mass of about 25 solar masses. It orbits an unseen companion with a period of 5.6 days. The companions mass is calculated to be about 14 solar masses, which is to large to be a neutron star. It is also found to emit the strongest X-ray source seen from earth. A likley candidate for this gravity scource is a black hole with an event horizon with a radius of about 26 km.

That's pretty awesome Martin. What did you use to take this image?

That's pretty awesome Martin. What did you use to take this image?

Nice capture!

Very interesting! Nice capture.

very nice,

Ben