By: Astrometeor , 11:12 PM GMT on June 23, 2013

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WEEKEND SUPERMOON: This weekend's full Moon is a "supermoon," as much as 14% bigger and 30% brighter than other full Moons of 2013. Last night, Alan Dyer photographed the swollen orb rising over the prairie in Gleichen, Alberta, Canada:

"After several days of torrential rain that brought horrific floods to many parts of southern Alberta, we were finally able to enjoy a clear night and the sight of the wonderful 'supermoon' rising," says Dyer. "[It] reminded us that the sky brings beauty as well as destruction.

The scientific term for the phenomenon is "perigee moon." Full Moons vary in size because of the oval shape of the Moon's orbit. The Moon follows an elliptical path around Earth with one side ("perigee") about 50,000 km closer than the other ("apogee"). Full Moons that occur on the perigee side of the Moon's orbit seem extra big and bright.

On June 23rd, the Moon becomes full at 11:34 UT, only 23 minutes after it reaches perigee. This near-perfect coincidence makes the Moon "super."

It's true that a perigee full Moon brings with it extra-high "perigean tides," but according to the National Oceanic and Atmospheric Administration this is nothing to worry about. In most places, lunar gravity at perigee pulls tide waters only a few centimeters (an inch or so) higher than usual. Local geography can amplify the effect to about 15 centimeters (six inches). The much greater flooding in Calgary was caused by rainfall, not by the perigee moon.


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4. WunderAlertBot (Admin)
12:16 AM GMT on June 25, 2013
Astrometeor has created a new entry.
3. Astrometeor
6:02 PM GMT on June 24, 2013
Member Since: July 2, 2012 Posts: 107 Comments: 11014
2. Astrometeor
4:19 PM GMT on June 24, 2013
Quoting palmettobug53:
Our skies cleared last night and I got an eyeful. An amazing sight.

How was camp?

Camp was great, thanks for asking. I might write a blog for it if I can get my lazy self to do one.
Member Since: July 2, 2012 Posts: 107 Comments: 11014
1. palmettobug53
12:57 AM GMT on June 24, 2013
Our skies cleared last night and I got an eyeful. An amazing sight.

How was camp?
Member Since: October 7, 2005 Posts: 245 Comments: 25972

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About Astrometeor

Age: 18, b-day is 8/27. Graduate of MLK High in Nashville, TN. Attends MU in PA. Loves football, soccer, Frisbee, Scouts, Science Olympiad.

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