The O/OREOS (Organism/Organic Exposure to Orbital Stresses) is an automated CubeSat nanosatellite laboratory approximately the size of a loaf of bread that contains two separate astrobiology experiments onboard. Developed by the Small Spacecraft Division at NASA Ames Research Center, the spacecraft was successfully launched as a secondary payload on STP-S26 led by the Space Test Program of the United States Air Force on a Minotaur IV rocket from Kodiak Island, Alaska on November 19, 2010.