When the Moon next covers the Sun, on the equinox, its hard-to-reach path will include the North Pole but very little land.

The Moon’s dark umbral shadow sweeps across Earth’s surface once every year from 2015 through 2017, but the eclipses forming this trio are remarkably different from one another. They provide a wide range of viewing difficulty — from very challenging to very easy — with the one occurring this month the toughest to get to see.

read more March 20th’s Arctic Total Solar Eclipse – Sky & Telescope.