Many moons to see in the sky or online

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It seems another Super Blue Blood Moon will occur only 19 years from now: January 31, 2037, at 8:06 a.m.

Though not quite astronomical odds, the chances of all three events occurring together are less than, well, once in blue moon - which incidentally occurs about once every 2.7 years, said Jason Aufdenberg, a professor of physics and astronomy at Embry-Riddle Aeronautical University.

31, at about 6:30 a.m., Tucsonans can look into the western sky and catch a reddened full moon caught in the center of Earth's shadow. There are two different definitions of blue moon. In fact, it should look considerably more orange than usual thanks to a total lunar eclipse.

This type of eclipse occurs when the sun, earth and moon are aligned in a straight line and the earth is between the sun and the moon. Dr Anil Pandey, chief of the Institute explained, "On that day, the moon will be on the closer orbit to the earth".

While the Earth revolves around the sun, the moon revolves around the Earth.

If you're not up in time or the sky is cloudy, you can watch the lunar eclipse live online. Such phenomenon happens when the Earth comes in between Sun and the Moon. Anything less than perfection will create a partial lunar eclipse or no eclipse at all.

Wednesday night will also be a supermoon, when the full moon will be closest to the earth on its orbital journey - a mere 360,198km away.

During totality, the moon may turn red or coppery. While other colours in the spectrum are blocked and scattered by the atmosphere, red makes it through.

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Neither a super-, blue or blood moon is overly rare, Aufdenberg said. But, remember, it is not a scientific term.

The moon's orbit is tilted by about 5 degrees relative to the Earth's orbit.

"We're seeing all of the Earth's sunrises and sunsets at that moment reflected from the surface of the Moon", says Sarah Noble, a Program Scientist at NASA headquarters. We'll only have three this winter, so the January 31 full moon won't be blue by this definition.

You can call this event rare. As a result, it appears much bigger and about 30 per cent brighter. It is hard to see much without astronomical instruments during the penumbral eclipse.

WHYis the celestial event significant?

So, on Wednesday, you'll have the opportunity to view a "Super Blue Blood Moon", something that hasn't happened since 1866. A similar event took place 55 years ago.

When a lunar eclipse happens, the moon appears to darken as it moves into the Earth's shadow called the umbra. The interval varies for different regions. The first is any time a second full moon occurs in a single month. 2017 only experienced One supermoon and that was in December.