I am studying Aeronomy and in particular Noctilucent Clouds to further understand how they're an indicator of changes in the upper atmosphere and whether these are linked with Climate Change. I will be using a high altitude balloon to study these as they form in the Upper Atmosphere, the Mesosphere which is 76km - 85km above Earth. Noctilucent Clouds are only observable during the summer months at Earths polar regions making them Earth's rarest clouds.