What is rush cygnus x 1?

Rush's "Cygnus X-1" is a two-part song that appears on the band's seventh studio album, "A Farewell to Kings," released in 1977. The song tells the story of a spaceship called the Rocinante that travels through a black hole and into a new dimension. The title "Cygnus X-1" refers to a real astronomical object, a binary star system in the constellation Cygnus. The song features complex instrumentation and signature Rush sound, including Geddy Lee's high-pitched vocals, Alex Lifeson's intricate guitar riffs, and Neil Peart's powerful drumming. The song's literary and scientific references reflect Rush's longstanding interest in science fiction and progressive rock.