Cygnus X-1 is a black hole about 15 times the mass of the Sun in orbit with a massive blue companion star. Astronomers used several telescopes including Chandra to study Cygnus X-1. The combined data have revealed the spin, mass, and distance of this black hole more precisely than ever before. Stephen Hawking lost a bet - originally placed in 1974 -- that Cygnus X-1 did not contain a black hole.
Tulip Nebula, at least in the field seen from earth, is in close proximity to microquasar Cygnus X-1, site of one of the first suspected black holes. It is also called Sharpless 101 (Sh2-101) or the Cygnus Star Cloud because the nebula located in the constellation Cygnus.
;-) - MVIDEO: Remastered version of this outstanding fan-made video of Cygnus X-1, now in HD720! Improvements include full screen resolution and consistency in aspect ratios throughout the video. Video now synchronized with music, as per viewer requests.