Time Lapse: A Total Solar Eclipse . ... Credit Copyright: Colin Legg Explanation: Have you ever experienced a total eclipse of the Sun? ... Suddenly, as the Moon moves to cover nearly the entire Sun, darkness sweeps in from the left -- the fully blocked part of the Sun. ... At mid-totality the darkness dips to the horizon below the eclipsed Sun, created by the shadow cone -- a corridor of shadow that traces back to the Moon. ... NASA Web Site Statements, Warnings, and Disclaimers . ...