At its peak, the Earth's shadow covered only 9% of the moon's diameter over Boston. This means about 4% of the moon's surface entered the umbra, the darkest portion of the Earth's shadow. Most of the ...
There's another reason to look into the night skies Tuesday: a partial lunar eclipse. Maximum coverage happens around 9:44 p.m. in Des Moines — when 3-4% of the moon will be covered by Earth's shadow.