The moon will pass through the Earth’s shadow and turn blood-red in the early hours of the morning on Saturday, in a brief total eclipse best visible from the western part of the US.
It will be the third in a series of four total lunar eclipses, or a “tetrad,” that began in mid-April last year. The second occurred in October 2014, and the last will be on September 28 this year. Tetrads are very rare: only seven more are expected by the year 2100.
Saturday’s eclipse will also be the shortest in a century, with the moon spending just four minutes and 43 seconds completely in Earth’s shadow. However, the time it will take for the moon to become completely occluded will be abnormally long, a whole 102 minutes, writes Space.com. This is because the moon will have just reached apogee, its farthest point from the Earth.