In the early morning of August 11, observers in Vietnam will be able to see a supermoon, an astrological phenomenon wherein the moon will be 14% closer to earth and 30% brighter, reports Vietnam Net.

According to Mr. Dang Tuan Duy, from the Ho Chi Minh City Amateur Astronomers’ Club (HAAC), the full moon will occur at 12:44am and astronomers say that the moon will not come this close to the Earth again until September 28, 2015.

The scientific name for the event on Sunday is a perigee full moon which isn't particularly rare, according to Geoff Chester at the U.S. Naval Observatory.

"Generally speaking, full Moons occur near perigee every 13 months and 18 days, so it's not all that unusual," said Chester. "In fact, just last year there were three perigee Moons in a row, but only one was widely reported."

"The illusion occurs when the Moon is near the horizon," according to NASA. "For reasons not fully understood by astronomers or psychologists, low-hanging Moons look unnaturally large when they beam through trees, buildings and other foreground objects."

If you want to learn more about supermoons, watch this video from NASA:

[Photo via Raja Singh]