Studying the Sun's atmosphere with the total solar eclipse of 2017

A total solar eclipse happens somewhere on Earth about once every 18 months. But because Earth’s surface is mostly ocean, most eclipses are visible over land for only a short time, if at all. The total solar eclipse of Aug. 21, 2017, is different — its path stretches over land for nearly 90 minutes, giving scientists an unprecedented opportunity to make scientific measurements from the ground.

Source:: Studying the Sun’s atmosphere with the total solar eclipse of 2017