O/OREOS (Organism/Organic Exposure to Orbital Stresses) is a nanosatellite of 5.5 kilogram, launched on November 19, 2010.
It is an automated laboratory that contains two separate experiments on board. It has been developed by the Small Spacecraft Division at NASA Ames Research Center, and successfully launched as a secondary payload on a Minotaur IV rocket from Kodiak Island, Alaska on November 19, 2010.
The O/OREOS satellite is NASA's first cubesat to demonstrate the capability to have two distinct, completely independent science experiments on an autonomous satellite. One experiment will test how microorganisms survive and adapt to the stresses of space; the other will monitor the stability of organic molecules in space.