Biggest 'supermoon' of the year on July 13.

On Wednesday (July 13) at 5 a.m. EDT (09:00 GMT), the moon will arrive at its closest point to the Earth for 2022: a perigee distance of 221,994 miles (357,264 kilometers) away. 

Nine hours and 38 minutes later, the moon will officially turn full. Though full moon theoretically lasts just a moment, that moment is imperceptible to ordinary observation, and for a day or so before and after most will speak of seeing the nearly full moon as "full": The shaded strip is so narrow, and changing in apparent width so slowly, that it is hard for the naked eye to tell whether it's present or which side it is on.  

So, when the moon shines down on your neighborhood on Wednesday night, keep this in mind: What you're looking at is not precisely a full moon, but a waning gibbous moon, already many hours past its stage of full illumination.

Source: www.space.com


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