50 years ago, scientists were studying why the sun’s corona is so hot
There’s still a lot we don’t know about why the corona reaches extreme temperatures
Astronomers on the U.S. East Coast used the 1970 solar eclipse (shown) as a chance to learn more about the sun’s superhot corona, which becomes visible when the moon blocks the most of the light from the sun.
NASA
An accommodating sun, Science News, February 28, 1970 –
This year’s eclipse [offers] an important opportunity for observation….