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longship

(40,416 posts)
10. Um! The closest moon happens every damned month.
Fri Jun 21, 2013, 05:40 PM
Jun 2013

The moon orbits in an ellipse, like every (so called) heavenly body. Thank you, Johannes Kepler. That means that it has an apogee (furthest from the earth) and a perigee (closest to the earth) precisely once per orbit, which takes just under a month. (Month == Moon, BTW).

It is only ignorant humans who make a big deal out of the perigee and the full moon (which also happens once every rotation). Yes, there is an occasional coincident perigee at the full moon.

So fucking what!? They each happen every fucking revolution so it's inevitable that they'll happen together.

Furthermore, as Phil Plait says, and as anybody who understands a little astronomy will tell you, there is no fucking discernible difference between the moon's size at apogee and perigee. The difference is far, far too tiny to be observable with your eyes.

Just filling in for those who don't get it.


Recommendations

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I can't see it through the mountains due east of here Warpy Jun 2013 #1
Phil Plait blogged about this the other day. longship Jun 2013 #2
appreciate the link Voice for Peace Jun 2013 #4
Yeah, you can't really tell pokerfan Jun 2013 #6
Um! The closest moon happens every damned month. longship Jun 2013 #10
Right pokerfan Jun 2013 #12
Well, you'd better have a damned good instrument to detect the difference. longship Jun 2013 #16
Again, right pokerfan Jun 2013 #17
Plus, it looks really large through a telephoto lens. longship Jun 2013 #19
I remember first time when i saw a supermoon as a child darkangel218 Jun 2013 #3
You mean lunartics?... awoke_in_2003 Jun 2013 #5
The Summer Solstice is June 21st, the longest day and shortest night of the year, bvar22 Jun 2013 #7
I know current usage is "the beginning of summer" truebluegreen Jun 2013 #15
True that pokerfan Jun 2013 #18
Sorry, can't make it. Please post pics. (n/t) Jim Lane Jun 2013 #23
Bring my own naked WHAT? HillWilliam Jun 2013 #24
Under the Super Moon at Midnight on the Solstice, bvar22 Jun 2013 #26
Is this the super moon that was supposed to hit Earth on Dec 21 2012? truedelphi Jun 2013 #8
No. truebluegreen Jun 2013 #22
I'm in. I can bring a few HillWilliam Jun 2013 #25
Gosh, that sounds delish. truedelphi Jun 2013 #27
I wonder what percentage of people flipping out over that can actually notice a difference. (nt) Posteritatis Jun 2013 #9
In the new America, you really do have to watch what you write. matt819 Jun 2013 #11
My neighbor just sent me an email about this. timdog44 Jun 2013 #13
Real treat tomorrow at sunrise? tomorrow (Saturday) coldbeer Jun 2013 #14
GROOVY! dreampunk Jun 2013 #20
I'm upstream a ways pokerfan Jun 2013 #21
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