Once in a blue moon, a supermoon turns into a blood moon. During the September 27 total lunar eclipse, the moon will turn a deep crimson when it passes through Earth’s shadow on its monthly closest approach to the planet — something that hasn’t happened since 1982.
The eclipse will run from 9:07 p.m. Eastern Daylight Time to 12:27 a.m. With clear skies, observers from western Europe to central North America could see the entire thing.
This eclipse coincides with a “supermoon” (when the moon passes closest to Earth during a full moon and appears slightly bigger than normal). And just like every eclipse, the moon will reflect the light from simultaneous sunsets and sunrises happening on Earth. That sunlight creates a “blood moon” as it filters through Earth’s atmosphere and casts a dark, ruddy hue.