Tomorrow’s harvest supermoon will also be a partial lunar eclipse. How to best view the rare celestial event.

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Tomorrow’s harvest supermoon will also be a partial lunar eclipse. How to best view the rare celestial event.

On Tuesday, Sept. 17, the harvest supermoon will coincide with a partial lunar eclipse, offering a unique spectacle for skywatchers.

While harvest moons happen every year, supermoons occur three to four times a year and partial lunar eclipses happen

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yearly. The convergence of all three events, however, is rare.

Here’s what you need to know about this unusual celestial event, and how best to view it.

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?

A harvest supermoon is a full moon that occurs closest to the autumnal equinox, which is usually around

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each year. It will become immediately visible at moonrise.

As NASA explains, a

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happens when a full moon is at or near its closest point to Earth in its orbit. This proximity makes the moon appear about 7% larger and 15% brighter than a typical full moon.

When this full moon also coincides with the equinox, it is referred to as the

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. According to

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, this special alignment provided extra light for farmers during the harvest season, as it rises close to the horizon for a few evenings in a row.

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?

According to

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, tomorrow’s partial lunar eclipse will begin at 8:41 PM ET, when it starts entering the partial shadow of Earth. The peak of the eclipse will be at 10:44 p.m. The moon will finish exiting the full shadow at 11:16 PM and the partial shadow on Wednesday morning at 12:47 a.m.

A partial lunar eclipse occurs when only a part of the moon passes through the Earth’s umbra, the darkest part of its shadow. During a

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, the moon’s surface becomes partially darkened by Earth’s shadow, creating a dramatic visual effect as the moon moves through different stages of partial obscuration.

Unlike a total lunar eclipse, where the moon is entirely covered by the

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(the first shadow cast during an eclipse), a partial eclipse only affects a portion of the moon’s surface.

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The phases of the moon in September. (NASA/JPL-Caltech)

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Locate the eastern horizon. To track the moon starting at moonrise, find a spot with a clear view of the eastern horizon. “The lower and less built-up your horizon, the better your chance of seeing the Harvest Moon rising in all of its glory – a fantastic sight that heralds the start of autumn,” according to BBC’s

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Check local moonrise times. Apps like

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can help determine when the moon will be rising or setting where you are. The

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also has a customizable moon table that provides specific moonrise and moonset times based on your location.

Check the weather forecast. Make sure it’s a clear, cloudless night. Websites like

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can tell you whether or not your location’s forecast is favorable for seeing the moon.

Prepare your equipment. While the harvest supermoon eclipse will be visible with the ****** eye, binoculars or telescopes can help enhance your viewing experience. According to

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, it’s best to choose binoculars with a minimum magnification of 7. Though a magnification of 10 or 15 will provide more detail, you may need a tripod to steady them.

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Here’s a look at what skywatchers might expect to see during tomorrow night’s harvest supermoon.

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A full harvest moon rises over One World Trade Center in New York City. (Gary Hershorn/Getty Images)

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A full harvest moon rising behind Rocca Calascio in Calascio, Italy. (Lorenzo Di Cola/NurPhoto via Getty Images)

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A harvest supermoon over the Sydney Opera House in Australia. (David Gray/AFP via Getty Images)

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A harvest supermoon over Canary Wharf in London. (Peter Macdiarmid/Getty Images)

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A harvest supermoon over Madrid. (Marcos del Mazo/LightRocket via Getty Images)

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A harvest supermoon over the Macquarie Lighthouse in Sydney. (David Gray/AFP)

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A photo compilation of 14 interval shots of the full harvest moon in Calascio, Italy. (Lorenzo Di Cola/NurPhoto via Getty Images)

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#Tomorrows #harvest #supermoon #partial #lunar #eclipse #view #rare #celestial #event

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