A “blood moon” lit the night sky on Sunday. A lunar tetrad, or a fourth consecutive total lunar eclipse with no partial eclipses in between, coincided with a supermoon, or a full moon that is also at its closest approach to Earth in its orbit.

NICHOLAS D. CURTIS

A “blood moon” lit the night sky on Sunday. A lunar tetrad, or a fourth consecutive total lunar eclipse with no partial eclipses in between, coincided with a supermoon, or a full moon that is also at its closest approach to Earth in its orbit. NICHOLAS D. CURTIS