 Have you ever wondered about the layers of the Earth's atmosphere? What happens at the transition zone between the Earth's atmosphere and outer space? In this NCAR Explorer Series lecture, we learn about the lower fringes of outer space, the thermosphere and ionosphere, with Dr. Li Yingchuan from the High Altitude Observatory. Discover how sunspot activity and eruptions in the sun from above, along with weather, climate and greenhouse gases from where we live, make the thermosphere and ionosphere grow and shrink in size, causing space weather and space climate. Learn how scientists study space weather and space climate, and how these changes can impact space technologies and space assets that we rely on.