Norman Rockwell, Walt Disney, Wernher von Braun, space habitats and moon landings - the improbable, bold history of space concept art.
Remember the prototype lunar rover that was believed to be scrapped but was recovered by a junkyard owner? It just failed to sell at auction, and could be yours if you have an amount of money more than $30000 burning a hole in your pocket.
Introducing the Nautilus-X MMSEV, a manned deep space craft proposed by a team at NASA's Johnson Space Centre.
NASA proposes using a Stirling cooler (essentially a Stirling engine in reverse) to keep a probe cool on the surface of Venus, which has had a tendency to melt or smash previous probes. The cooler would maintain a 25cm sphere within the probe at 200°C -- 100°C above the boiling point of water but sufficiently cool for a high-temperature microcontroller to operate. The waste heat radiators on the exterior of the sphere would reach the temperature of 500°C, 40°C above the the normal Venusian surface temperature.