Deep partial lunar eclipse will cast coppery glow on moon Thursday night

A very deep partial lunar eclipse on Aug. 27 will turn 96% of the moon's surface a coppery red, visible in full across the Americas. The eclipse peaks just after midnight EDT and is the deepest lunar eclipse worldwide until a total one on Dec. 31, 2028. The red hue occurs because Earth's atmosphere absorbs blue and yellow light while refracting red light onto the moon.