Article

NASA's Jupiter Icy Moons Orbiter (JIMO), started in 2002, aimed to explore Jupiter's moons Europa, Ganymede, and Callisto using nuclear power and electric propulsion. Canceled in 2005 after spending $463 million, JIMO faced technical challenges, including the development of a nuclear reactor for space operation.

The project was initiated without full scientific community backing and was impacted by NASA's shifting focus towards lunar exploration. Although JIMO was deemed too ambitious, insights gained influenced later missions such as the Europa Clipper, scheduled for launch in 2024, highlighting JIMO's mixed legacy in planetary science.