Four Blood Moons: Supermoon Eclipse Will Cap Epic Lunar Tetrad

August 21, 2016 - Supermoon

The singular “supermoon” sum lunar obscure on Sunday (Sept. 27) will symbol a finish of a good eclipse-viewing era.

The Sunday dusk eclipse is a final in a “tetrad” — a tenure for 4 sum lunar eclipses function during six-month intervals — that has been overwhelming skywatchers opposite a United States for a past 18 months, and also sparking swindling theories about what it could mean.

“The many singular thing about a 2014-2015 tetrad is that all of them are manifest for all or tools of a USA,” NASA obscure consultant Fred Espenak pronounced in a matter final year. [Supermoon Lunar Eclipse: Complete Blood Moon Coverage]

What creates Sunday’s obscure even some-more special, however, is that it will start when a moon is during a closest indicate to Earth in a elliptical circuit and therefore appears abnormally vast and splendid in a sky. This supposed “supermoon” obscure will be a first one given 1982, and a final until 2033.

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A lunar obscure happens when a moon passes into a shade of a Earth. When a moon is totally eclipsed, it goes totally in a shadow, turns red or reddish-brown, and stays that approach for adult to an hour. No special apparatus or eye insurance is indispensable to see it, and it is ocular anywhere a sky is dim and a moon is visible.

There are several kinds of lunar eclipses, such as when a moon passes into a corner of a palest prejudiced of a shade (a penumbral eclipse) or when a moon partially enters a deeper prejudiced of a shade (a prejudiced eclipse).  

While a fixing of a sun, Earth and moon make lunar eclipses occur about twice a year, customarily it’s a sum obscure followed by a opposite kind of eclipse. Tetrads have been a visit occurrence in a 21st century — there are 8 in this century alone, Espenak forked out in a statement — though that doesn’t always happen. Between 1600 and 1900, there were no tetrads during all.

But a series of “blood moons” seen in a past 18 months sparked some swindling theories about probable dangers to humanity. In 2014, according to skywatching columnist Joe Rao, online rumors drew a link between a eclipses and biblical prophecies of a apocalypse — a speculation also popularized in a book called “Four Blood Moons” by John Hagee (Worthy Publishing, 2013).

Editor’s Note: If we snap an extraordinary design of a Sept. 27 sum lunar eclipse, we can send photos, comments and your name and plcae to handling editor Tariq Malik during

Follow Elizabeth Howell @howellspace, or @Spacedotcom. We’re also on Facebook and Google+. Original essay on

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