The "Blood Moon" phenomenon will start before the full moon reaches peak illumination. As the lunar eclipse begins, the moon will start moving through Earth's shadow on Thursday at 11:57 p.m. ET.

The moon is seen beside a quadriga on the top of the Cinquantenaire arch during a total lunar eclipse, known as the "Super Blood Wolf Moon", in Brussels, Jan. 21, 2019. Yves Herman/Reuters ...