The Jan. 31 full moon was special for three reasons: it’s the third in a series of “supermoons,” when the Moon is closer to Earth in its orbit and about 14 percent brighter than usual. It’s also the second full moon of the month, commonly known as a “blue moon.” The Moon will pass through Earth’s shadow to give viewers in the right location a total lunar eclipse. While the Moon is in the Earth’s shadow it will take on a reddish tint, known as a “blood moon.”
And the Jan. 31 moon combined with theses three factors, which is called as “Super Blue Blood Moon.”
The “Super Blue Blood Moon” on Jan. 31 is not only the second full moon in one month and also the second “supermoon” in 2018, but the first lunar eclipse to coincide with a Blue Moon in 150 years, which is a rare lunar sight visible to millions of observers around the world. With the moon appearing slightly bigger and brighter than usual as a supermoon, the super blue blood moon casting a reddish hue on the lunar surface lasted for more than 4 hours.
The super blue blood moon was visible in U.S., Australia, and eastern Asia. The moonlovers in the western U.S. had the best view of lunar eclipse, and the moon set beneath the horizon before the eclipse came to an end in farther east.