Agency
Exosat image of Cygnus X-1
An Exosat 6-300 image of the black hole candidate Cygnus X-1. [Image Date: 01-09-84] [84.09.019-012]
An Exosat 6-300 image of the black hole candidate Cygnus X-1. [Image Date: 01-09-84] [84.09.019-012]
