The Moon During a Total Lunar Eclipse

Explanation: How does the Moon's appearance change during a total lunar eclipse? The featured time-lapse video was digitally processed to keep the Moon bright and centered during the 5-hour eclipse of 2018 January 31 . At first the full moon is visible because only a full moon can undergo a lunar eclipse. Stars move by in the background because the Moon orbits the Earth during the eclipse . The circular shadow of the Earth is then seen moving across the Moon. The light blue hue of the shadow's edge is related to why Earth's sky is blue , while the deep red hue of the shadow 's center is related to why the Sun appears red when near the horizon. Tomorrow night , people living in Eastern Asia , Australia , and much of North America may get to see a Total Blood Moon Lunar Eclipse . Here the term blood refers to the (likely) red color of a fully eclipsed Moon .

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