Science: How did the supermoon form?

The supermoon rises near the Lincoln Memorial on March 19, 2011, captured by senior NASA photographer Bill Ingalls.
, November 14, 2016, at 18:00 BST, by NASA's Goddard Science Visualization Studio (SVS) Charting When you look up at the moon on November 14, 2016, you not only see the full moon, but also on the same day, the moon orbits the Earth. It will run to percose, where you'll see an extremely rare supermoon, commonly known as Supermoon, this time called Extra-super Moon by NASA, the closest full moon to Earth since 1948, and the next time we'll see such a supermoon is in 2034.
The term supermoon has been well known in recent years, but the term supermoon derives from modern astrology, meaning that when a new moon and a full moon occur, the distance between the earth's moons is closer to normal.
the supermoon generally means that when a full moon occurs, the distance between the moons is closer than usual.
point of view, astrology has contributed to the popularization of astronomical knowledge.
today we talk about the science behind the supermoon.
: Why is the moon sometimes closer to earth and sometimes farther away?The moon's orbit is located at perigee (pictured from NASA video) Because the moon's orbit around the Earth is a slightly elliptical orbit, with near-location (perigee) and apogee, the apogee is the farthest point from Earth when the moon is orbiting, and the perigee is reversed.
when the moon passes through peresse, it is about 48,000 kilometers (30,000 miles) closer to Earth than it is to Earth at an ad site.
: How did the supermoon form?The supermoon is first and foremost a full moon, and when it passes near perina, it happens to be a full moon, which we call a supermoon.
the distance between the moons is much larger than the small changes in the moon's orbit, so that we don't look very obvious to the naked eye.
about four or six supermoons a year on average, but with the naked eye we won't notice how different this full moon is from other full moons, so the supermoon isn't a strange sight.
: What's the difference between a supermoon this time?Supermoons that are full moons and pass through perdesse on the same day are common in the last three months of 2016, on October 16, November 14 and December 14, respectively.
's the supermoon on November 14th different?At 18:15 BST on 14 November (06:15 AM EST on 14 November), the lunar orbit passed through perdession, with a closest distance of approximately 356,508 km, the distance from the center of the Earth to the center of the Moon.
after 2 hours and 37 minutes of perodes, the full moon arrived.
(data from Space.com) This supermoon is of particular interest because it is the closest full moon to Earth since January 26, 1948.
will happen next time on November 25, 2034.
looks 14 percent larger and 30 percent brighter (pictured from NASA video) And when you go out to see the moon on November 14th, you'll probably see the Gemma meteor shower, which will certainly be much less spectacular.
the video below is a full video of NASA scientist Noah Petro answering a question about the supermoon on Facebook and may contain other answers you want to know.
source: NASA Chinese.