British astronomer (born 1942) who identified the first stellar black hole in our galaxy, a star called Cygnus X-1. Two items: an original ballpoint sketch of the interaction between the blue supergiant variable star designated HDE 226868 and the Cygnus X-1 black hole on a white 8 x 5 sheet, signed below by Murdin, who adds a brief note: "I saw the effect of Cygnus X-1 on the star HDE 226868 and was able to infer the existence of the black hole in Cygnus X-1. Paul G. Murdin"; and an ALS, signed "Paul," one page, 5.75 x 8.25, July 27, 2016, in full: "My reply to your letter is late but your letter was much delayed in getting to me. I hope the enclosed meets your needs." In overall fine condition.
We use cookies on this site to improve your experience. By using this site, you accept our use of cookies. To learn more, please see our Privacy Policy.
