Witness The Rare Super Blue Blood Moon on Jan 31

The lunar eclipse on January 21, 2019, will be seen across the United States, Johnston said, adding that the moon will be a supermoon but not a blue moon.

Affelia Wibisono, also an astronomer at the Royal Observatory in Greenwich said: "March is expected to have two full moons, which, by the modern definition, means there will be two Blue Moons this year".

In Chicago, observers will see the penumbra touch at 4:51 a.m. CST and the umbral eclipse starts at 5:48 a.m. CST.

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So what is a supermoon? . In addition, this visualization shows the moon's orbit position, sub-Earth and subsolar points, distance from the Earth at true scale, and labels of craters near the terminator. "The radius changes around the circle".

The "supermoon" name was first coined by an astrologer, Richard Nolle, in 1979.

It's the ideal mashup with the full moon on its closest orbit to earth, and earth's shadow covering up the face of the moon.

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Will the moon really look blue?

A blue moon is simply the second full moon in any calendar month.

"I'm calling it the Super Bowl of moons", lunar scientist Noah Petro told the AP Monday from NASA's Goddard Space Flight Center in Greenbelt, Maryland. Midway through Wednesday's eclipse, the moon will be even farther away - 223,820 miles (360,200 kilometers) - but still within unofficial supermoon guidelines. Unfortunately, the moon will set at 7:20 a.m., meaning we miss the time from mid-eclipse through the moon coming out of the earth's shadow. The fact that the moon is in earth's shadow is what makes it darker and redder than usual. This alignment is known as "syzygy". The way light waves are scattered by the atmosphere - a process called Rayleigh scattering - also accounts for the colors you see at sunrise and sunset.

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The phenomenon is a combination for three unique lunar events that are happening at the same time. All of Alaska will be able to see the eclipse, weather-willing. "They don't necessarily line up with each other". It's such a rare occurrence that it hasn't happened in 152 years. "Most of me does wince about the nicknames but part of me doesn't because it's about getting people to go outside and look up at night". That "bite" gets bigger and bigger as the Moon moves deeper into the shadow.