Tonight the smallest full moon of the year

The phenomenon of the full moon tonight occurred when "Sister Hang" approached the farthest point from the earth in its orbit, making the moon disk area the smallest in 2011.

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Space said that at 2:06 GMT GMT today (9:06 am Hanoi time), the moon will appear as a circular disc. Nearly 10 hours later, the moon will reach its (farthest point) point in its orbit in October. At this location, the distance between the moon and the earth is about 406.434km.

The moon will reach the farthest point of Earth on its orbit on October 11.

In March last year, the moon disc turned into a round state when it was close to the point (the closest point to the earth) in orbit, creating a phenomenon called "super moon" . Tonight's moon disc will be 12.3% smaller than 'super moon' in March, meaning the smallest in 2011.

And also because the moon is close to perspective, observers will see it move relatively slowly.

Within a year, the full moon will appear in many locations. Due to the distance from these positions to different earths, the observer will see the magnitude of the moon change.The cause of this phenomenon is that the moon revolves around an elliptical orbit, not a circle. But the moon's orbital position is not fixed relative to the earth but constantly changes due to the impact from the sun.

The period between the two full moons is 29.53 days (called the social month), while the moon's time moving from one point to the next point is 27.55 days.

Therefore, if the full moon coincides with the time when the moon approaches the point (as was the case in March last), it will approach the next point about two days before the full moon in the next month. As a rule, the full moon on October 26 will coincide with the moon approaching the point.