Sunday, October 23, 2016
Heads Up! The Black Moon on October 30
If you're living in the Eastern Hemisphere, the Black Moon will arrive on Oct. 30 or, if you live in eastern Asia, Japan, Australia or New Zealand, not until Oct. 31.
The Black Moon is a somewhat unusual celestial event — they occur about once every 32 months.
Why would a bright full Moon suddenly become dark? Because it entered the shadow of the Earth.
What is a Black Moon?
While a full moon refers to the moment when the moon's Earth-facing side is fully illuminated by sunlight, a new moon refers to the moment when the moon's Earth-facing side is fully in shadow. (Unfortunately, that means the Black Moon will be more or less invisible, even if the moon is high in the sky).
Animation: time lapse of a total lunar eclipse
Video source: http://apod.nasa.gov/apod/ap140428.html