While the volcanoes on Earth eject fiery lava, ash, and smoke, those on Ceres, a dwarf planet that orbits between Mars and Jupiter, have been spewing ice throughout its history. The chain of events leading to the discovery began in 2015 when NASA’s spacecraft Dawn, sent to explore the asteroid belt where Ceres resides, captured some high-resolution images of its icy, rocky terrain. On the dwarf planet’s crater-covered surface, was a solitary 4-km ( 13,000 feet) tall mountain.