The only supermoon of the year is happening Sunday night

(CNN)– On Sunday, stargazers, astronomers and curious sky-watchers will get an opportunity to witness the primary and solely supermoon of 2017.

In November 2016, the moon reached a distance closest to the Earth than ever seen since 1948, producing a supersized supermoon. Nevertheless, on Sunday night time, the moon will nonetheless shine sixteen% brighter and seem 7% bigger than its normal measurement.

A supermoon happens when the solar, moon and Earth align, and a full or new moon aligns with the solar’s lunar orb. This supermoon would be the first within the collection of three consecutive full moon supermoons, the subsequent two to happen in January.

Whereas it has been a yr since a visual supermoon final lit up the sky, everybody on the earth has an opportunity to marvel at this upcoming full moon. Most astronomers recommend watching the supermoon proper after sundown and into moonrise, and minutes earlier than the subsequent dawn as properly.

However for many who can’t get up that early, the moon will nonetheless look greater — and brighter — all through the night time.

The science behind the supermoon

In line with Michelle Nichols, director of public observing at Chicago’s Adler Planetarium, there’s a purpose behind the moon’s fascinating shut strategy to the Earth.

“The moon’s orbit just isn’t an ideal circle. It’s extra like an oval, so at occasions it’s nearer to the Earth than it’s at different occasions. The distinction in distance between these shut and much factors may be as a lot as about 30,000 miles.”

The space between the moon and Earth continuously modifications. Every time the moon orbits the Earth, each 29.5 days, it is going to attain an in depth level to the Earth (perigee), and a far level (apogee), and infrequently, the shut level might be near the date of the complete moon or new moon, a supermoon.

“For this yr’s ultimate supermoon, the perigee distance shall be roughly 222,one hundred thirty five miles within the early morning hours of December four (in the USA),” says Nichols.

And whereas it might seem tremendous, the time period “supermoon” just isn’t the official time period for the astronomical phenomenon. The scientific time period is “perigee syzygy.” Perigee syzygy has occurred three earlier occasions in 2017.

Nevertheless, December’s full moon is the one seen supermoon. It’s because the earlier two have been across the time…

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