Space History auctions focus on space exploration from the early days of Project Mercury and Vostok through the Gemini missions, the historic Apollo moon landings, Soyuz, Skylab, ASTP, and beyond.

The auctions feature photographs, flight plan sheets, Robbins medallions, models, patches, emblems, flags, lunar surface equipment and other hardware, much of it flown and often signed and inscribed by astronauts and cosmonauts such as Neil Armstrong, Buzz Aldrin, and Yuri Gagarin.

The sales take place annually in New York, and highlights have included Armstrong's "One Small Step for a Man" signed quotation ($150,000), the Apollo 11 lunar surface star chart ($218,000) and Leonov's 1975 ASTP space suit ($240,000). Bonhams is a market leader in this rapidly growing field.