Farewell to NASA’s Kepler Telescope

Kepler—the beloved NASA telescope responsible for discovering 70% of the 3,800 confirmed “alien worlds” to date—officially met its end yesterday. After nearly a decade of exploration, the telescope ran out of fuel and can no longer transmit data or focus on transient objects in space. During its time in flight the Kepler was able to study nearly 150,000 stars simultaneously and could determine exactly which ones …