NASA’s Cassini spacecraft has detected a giant new ice cloud in low- to mid-stratosphere of Titan, the largest moon of Saturn. In 2012 Cassini spotted a cloud system called the south polar vortex in Titan’s atmosphere at an altitude of about 186 miles. The spacecraft’s instrument has now detected a massive ice cloud below it. This image was taken by Cassini in 2013. Image credit: NASA / JPL-Caltech / Space Science Institute. Cassini had already...