
NASA's AIM spacecraft ends 15-year mission in silence.
NASA's AIM mission, which was launched in 2007 to study noctilucent clouds, has ended after 15 years due to a battery power failure. The spacecraft was only meant to operate for two years but provided data for multiple groundbreaking studies, including a recent 2018 study that found methane emissions are causing night-shining clouds to form more frequently.
