Thierry Legault Captures ISS Transit of the Sun -- During Eclipse!

“For transits I have to calculate the place, and considering the width of the visibility path is usually between 5-10 kilometers, but I have to be close to the center of this path,” Legault explained, “because if I am at the edge, it is just like a solar eclipse where the transit is shorter and shorter. And the edge of visibility line of the transit lasts very short. So the precision of where I have to be is within one kilometer.” Legault studies maps, and has a radio synchronized watch to know very accurately when the transit event will happen.