Why is the sun's outer atmosphere so much hotter than the star's roiling interior? Astronomers hope that the recently launched Hinode spacecraft, which has begun staring at the sun with a trio of telescopes, will help solve that puzzle.
Images taken during the testing phase of the Hinode mission, a Japanese-British–U.S. collaboration, have examined the solar surface as well as the sun's outer atmosphere, or corona. Focusing on the sun's surface, the