Music group formed by singer, songwriter, multi-instrumentalist, and producer Michael Macintosh - who was the only permanent member of the band until the official addition of musician / producer Crystal Macintosh in 2005.

Additional musicians include: Amadeus Muir, Joe Sorella, Peter Haus, Keith Carrington, Bessie Aysel Sönmers, Walter Simons, Shannon Angel, Gato Aguilera, Thomas Welsh, Byron Burke, Moose Taverns, Steven Cagney, etc.

YAC sub-projects include: The Poison Control Centre, Prize America, Pink Kaffir, Ov, Michael Macintosh + Thee Double Crossers Orchestra, the solo music of Michael Macintosh + Crystal Macintosh and others - all are filed separately and under Young Astronauts Club.