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If you unfortunately missed the recent supermoon over the weekend on Friday, July 12, you have got another two chances this year. On August 10 and on September 9 supermoon will occur once again and hopefully one will be bigger than the previous. 

On August 10 the Moon will be closest to the Earth, appearing as the biggest supermoon for this year. 

"The Moon's distance from the Earth varies every month from between about 357,000 kilometers and 406,000 kilometers. The reason for the varied distance is due to the Moon's elliptical orbit around the Earth. When the Moon is nearest to the Earth it is called perigee moon and appears to be 14 percent bigger and 30 percent brighter when compared to when it is at its farthest point, or apogee," TechTimes explains. 

According to experts supermoons are not unusual. Last year there were three supermoons but only one was widely reported. 

NASA added it is difficult to observe the 30 percent extra brightness of the supermoon when compared to a regular full moon. 

 "In practice, it's not always easy to tell the difference between a supermoon and an ordinary full Moon. A 30% difference in brightness can easily be masked by clouds and haze.  Also, there are no rulers floating in the sky to measure lunar diameters. Hanging high overhead with no reference points to provide a sense of scale, one full Moon looks about the same size as any other," NASA said in a statement.