There are two ways to see the sun’s corona: Send up a spacecraft or wait for a total solar eclipse. On the left, the sun’s wispy atmosphere glows with ultraviolet light, captured by the European Space Agency’s PROBA2 satellite. Loops and arcs of plasma follow magnetic field lines coming from the sun. On the right, light scattering off particles in the corona becomes visible during the 2017 total solar eclipse that traversed the United States. (CREDIT: S.R. CRANMER AND A.R. WINEBARGER / AR ASTRO