At 19:26 on October 17, the moon will usher in the "look", that is, the moment of the full moon, and at 8:51 on the 17th, the moon will pass its perigee. Astronomical science experts said that this is the closest time to the moon's perigee time this year, with a difference of less than 11 hours, so this full moon has become the largest full moon of the year and a "supermoon".
It was the biggest Full Moon of the year taken on May 26, 2021 at the site of Tanah Lot in Sounion, Greece. Xinhua News Agency (Photo by Marios · Rollos)
When the Moon and the Sun are on opposite sides of the Earth, and the ecliptic longitude of the Moon and the Sun are 180 degrees apart, the Moon illuminated by the Sun is all facing the Earth, which is called the "Full Moon", also known as "Wang". The 14th, 15th, 16th, and even 17th of the lunar month are all possible times when a full moon may occur.
Yang Jing, a member of the Chinese Astronomical Society and a director of the Tianjin Astronomical Society, introduced that the orbit of the moon around the earth is an ellipse, and its orbital speed is not equal, so the moon will sometimes be closer to the earth, sometimes farther away from the earth, the closest place to the earth is called perigee, and the moon will run faster, otherwise it is called apogee, and the moon will run slower.
This is the largest Full Moon of the year filmed in Beijing on April 8, 2020. (Photo by Tang Bo)
When a Full Moon occurs, the closer the Moon is to Earth, the larger and brighter it will appear to be seen. The largest Full Moon of the year occurs if the time of the year coincides with the time when the Moon is at perigee. The Smallest Full Moon of the year occurs when the Full Moon occurs exactly when it is closest to the Moon's apogee. The apparent diameter difference between the maximum and minimum Full Moons is about 14%.
This is the largest full moon and the smallest full moon of the year 2019 (imposition). (Photo by Yuan Fengfang)
There are usually 12 or 13 full moons in a calendar year. "There have been 12 full moons this year. If you put them in order, the Full Moon on October 17 is the largest. Yang Jing said that the difference in the size of the full moon is difficult to distinguish with the naked eye, and interested members of the public can observe the difference in size through photo comparison if they attach their cameras to a telephoto lens or telescope and photograph the full moon under the same conditions.
It is the biggest Full Moon of the year to be filmed in Rawalpindi, Pakistan, on May 26, 2021. Xinhua News Agency (Photo by Ahmad · Kamal)
How to enjoy the biggest Full Moon of the year? "The full moon occurred at 19:26 on the 17th, shortly after the moon had risen in the east. When night falls, a full moon hangs in the night sky, if there is a ground reference, the naked eye will feel that the full moon is relatively large, and friends who like photography can take creative photos in combination with characteristic landscapes. Yang Jing said.
Source: Xinhua News Agency