Diversity in STEAM from a Real-Life Guardian of the Galaxy Moogega “Moo” Cooper is a real-life “Guardian of the Galaxy.” As the planetary protection lead of the famed NASA 2020 Mars mission, she’s responsible for keeping the red planet safe from any of Earth’s contaminants. Her work with NASA's Jet Propulsion Laboratory is integral to the ongoing mission to discern whether Mars could be habitable for humans and that we don’t harm what’s already there.