Reuters-By Steve Gorman
The “Beaver blood moon” partial lunar eclipse is seen above the Washington Monument in Washington, U.S., Nov. 19, 2021. REUTERS/Al Drago
The reddish appearance of the lunar surface – the moon does not entirely disappear from view – is caused by rays of sunlight around the outer edge of the eclipse shadow, or umbra, being filtered and refracted as it passes through Earth’s atmosphere, bathing the moon indirectly in a dim copper glow.
WHERE IT’S VISIBLE
HOW LONG IT LASTS
WHY BEAVER MOON