Eclipse watchers will go after the biggest solar mystery: Why is the corona so hot?
Usually when you move away from a heat source, it gets cooler. Not so in the sun’s atmosphere.
THE KITCHEN SINK There are a lot of ways to study the sun, as shown in this multi-wavelength mosaic from NASA’s Solar Dynamics Observatory. During the eclipse, physicists will take every possible route to figuring out why the corona is so hot.
NASA Goddard Space Flight Center
A total solar eclipse shines a light on the sun’s elusive atmosphere.