|Demo by Weezer|
|Recorded||November 14, 2001|
|Status||Free on weezer.com|
|Rivers Cuomo song chronology|
"Cygnus X-1" is one of very few instrumental recordings Weezer have made that was intended to be instrumental. First recorded during the Steak House/Cello demos of late 2001, a rendition from the Glenn Sound Demos was released as a free mp3 at Weezer's official site. It has never been performed live.
It is unknown whether the band named the track after the song by Rush, the celestial body that inspired the Rush song, or both.