NASA features seasonal Martian cloud in Astronomy Picture of the Day

NASA's Astronomy Picture of the Day for November 2, 2026, showcases the Arsia Mons Elongated Cloud (AMEC) on Mars. This unusual water-ice cloud, first seen in 1977 by Viking Orbiter 2 and recently by Mars Express, forms seasonally and can stretch over 1500 kilometers. Scientists continue to study its formation, which may offer insights into cloud processes on Earth.