The Chesley Awards were established in 1985 by the Association of Science Fiction and Fantasy Artists to recognize individual artistic works and achievements during a given year. The Chesleys were initially called the ASFA Awards, but were later renamed to honor famed astronomical artist Chesley Bonestell following his death in 1986. The awards are presented annually, typically at the World Science Fiction Convention (Worldcon).
^"People in Business". The Tennessean (Nashville, TN). September 24, 2006. p. E5. Retrieved August 28, 2012. "The Chesley Awards, established in 1985 by the Association of Science Fiction and Fantasy Artists, are annual international awards presented during the World Science Fiction Convention and on some occasions when WSFC is on another continent, the North American Science Fiction Convention."