A Blue Blood Moon . ... Credit Copyright: Dominique Dierick Explanation: This sharp telescopic snapshot caught late September's Harvest Moon completely immersed in Earth's dark umbral shadow , at the beginning of a total lunar eclipse. ... A dark apparition of the Full Moon near perigee, this total eclipse's color was a deep blood red, the lunar surface reflecting light within Earth's shadow filtered through the lower atmosphere. ... NASA Web Site Statements, Warnings, and Disclaimers . ...