On Friday, August 7th, 2020, NASA’s Aeronomy of Ice in the Mesosphere (AIM) mission officially retired after 14 years of observing ‘noctilucent’ clouds at the edge of space. Noctilucent clouds are the highest clouds in Earth’s atmosphere, occurring near the edge of space, 80 kilometers above the Earth’s surface. These clouds, which form above mesospheric… Continue reading RIP AIM: NASA Probe Retires From Observing Clouds at the Edge of Space