Fri, 03/17/2023 - 15:55 Gizmodo Environment For the past 15 years, a small NASA spacecraft has explored the edge of space, probing the elusive clouds that form in Earth’s mesosphere. But the spacecraft is no longer operating the way it used to, forcing the team to end its mission.Read more... Tags NASA, atmosphericopticalphenomena, aeronomyoficeinthemesosphere, mesosphere, spaceflight, noctilucentcloud, spacecraft, Environment, nature, technology2cinternet, northandsouth Source RIP AIM: NASA Probe Retires From Observing Clouds at the Edge of Space