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Country Discussion Topics
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Moon With Rings/Halo Question
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EIEIO    Posted 08-26-2002 at 05:58:21       [Reply]  [No Email]
Good Morning, I went out early early this morning and saw this beautiful moon. Two pictures are in the picture gallery. It either has rings or a halo around it. I had never seen this before, remember I come from a city with lots of pollution. Does anyone know what is around the moon and if astronomy wise it means anything and what it is called? Sure would appreciate your expert help.

I hope all of you have a week filled with laughter, smiles, and love.


Dreamweaver    Posted 08-26-2002 at 16:19:42       [Reply]  [No Email]
Moon with rings or "halos" around it definitely means rain is in the picture.


ger    Posted 08-26-2002 at 17:31:05       [Reply]  [No Email]
thats what i been telling them all day lol an it,s been raining here all day


WallSal55    Posted 08-26-2002 at 08:04:51       [Reply]  [No Email]
Thanks for posting the pic, EI. Here, I wondered if there was a halo, as we had a lot of haze and
fog.
I am confused though. I thought a halo around a moon meant a stretch of fair weather
(which we have here in our IL forecast until
Thurs. or so, then chance of rain). Also, a halo or orange glow around the moon in the fall means Indian Summer follows ?! This is according to farmer's tales.
I remember our local meterologist said that the moon definitely has a tell-tale sign of Indian Summer and told what to look for. Now we will all
turn into moonwatchers!


Chuck, WA    Posted 08-26-2002 at 07:31:17       [Reply]  [No Email]
Actually, Mudcat's got it right. It's ice crystals, and the details of the halo depend on the shape of the crystals. It's the same thing as happens when you see "sun dogs." The commonest halo is the 22-degree halo - that's when the angle between the sun or moon and the halo itself is 22-degrees - it can be so precise because it depends on the internal angle in the crystals, which is precise. The halo itself is usually about 1.5 degrees wide and can be white, or can have tinges of color.

From the pictures, I'm not sure that what you saw is this kind of halo. The 22-degrees usally means that the halo is well separated from the sun (or moon in your case), and your pictures don't show this. If you hold your hand out at arm's length, the width across your fist - pinkie knuckle to index finger knuckle - is roughly 15 degrees. It varies from individual to individual - mine is about 18-deg. - but is a useful way to estimate angles. Across your thumb knuckle is about 5-deg.

But, since the halo is usually much fainter than the blur around the sun or moon, it is relatively low contrast, so sometimes it's hard to get it to show up in the picture. If what you saw looks like the picture I've put in the gallery, then this is the explanation. If your pictures are accurate, then it could also just be a lot of moisture in the air - like looking at the sun or moon through a cloud layer. That's caused by the light rays scattering, whereas the halos are caused by light refracting through the ice crystals like the rays refracting through raindrops that causes a rainbow.

I've put a pic on the gallery that's scanned from a book I have published by Scientific American from back in 1978 (Light from the Sky, WH Freeman and Co., 1978, page 39) that shows a 22-deg halo. Sorry...I know I have some original pics someplace, but no idea where, so this at least shows what it usually looks like. This particular book is copies of articles that have appeared in Scientific American on natural sky phenomena (aurora, ball lightning, rainbows, halos, etc.). this particular article was from the April 1978 issue if you want to look it up and get more information.

Interesting note that folklore has it that such halos are predictors of bad weather coming, and there is some truth in that. A falling barometer is usually caused by an advancing low-pressure system. Violent convection carries moist air near the surface to 30,000 to 50,000 feet where the air becomes supersaturated with water vapor because of the freezing temperatures at that altitude. The vapor condenses out and forms cirrus clouds which are carried along by the high velocity winds above the system. Thus, the halos are seen in the cirrus clouds that come in advance of the bad weather. (paraphrase from article)

How's that for overkill on a simple question? :) Sorry...ex-physics teacher and can't resist that kind of question!


Patria    Posted 08-26-2002 at 09:48:59       [Reply]  [Send Email]
Chuck thanks a lot for your input about the moon's ice cristals. I'm going to give this to my daughter to use it for her homework!!!!

Hang around boy, in case we need you again...:-)

Regards


Chuck, WA    Posted 08-26-2002 at 10:10:55       [Reply]  [No Email]
Patricia...

Oops...hope I didn't imply that the ice crystals are on the moon! Actually, they are in our upper atmosphere. Sorry if it was misleading.


Patria    Posted 08-26-2002 at 10:41:20       [Reply]  [Send Email]
Chuck?... guess I didn't read carefully your message,I'm doing it now. Still, it is going to work for my daughter's project. Thanks again.

PS: Oops...to you also...It's Patria , not Patricia, I'm afraid you had your share of miss-reading too. We are even now..:-))

And like I said before?...don't go to far.

Regards


ger    Posted 08-26-2002 at 10:47:37       [Reply]  [No Email]
old wives tale rings around the moon mean rain,lol


EIEIO    Posted 08-26-2002 at 09:46:36       [Reply]  [No Email]
WHOA! I printed the answer out so that I can read it slowly. You must have real big brains! LOL

Seriously, I really do appreciate all the time you took to answer my question. It is just sad that at my age I am finally learning things that I never paid attention to in school. At least I am learning though.

Thanks again!


agent99/never to old    Posted 08-26-2002 at 10:15:11       [Reply]  [No Email]
a wise gent that you know on here , would tell you it,s never to old to learn , an noticed , i never mentioned wise old (ER) gent , right hogman .


007 ***DURN IT 99    Posted 08-27-2002 at 04:06:40       [Reply]  [No Email]
there Ya go again with them slanderus remarks about dodderin old age----------------feebelness---------failin Isite------MERCY!


Moondog...    Posted 08-26-2002 at 06:56:28       [Reply]  [Send Email]
'Moondog' is what that is called...happens to the sun (Sundog) also during the day when there are high thin clouds ro 'polution'/haze...it is actually a 'rainbow' or refraction of the light through the water vapour in the upper atmosphere...


Prof Hanswaving.....Goodness Me!    Posted 08-26-2002 at 06:55:32       [Reply]  [No Email]
Zis iz nutting to mess arount mit,You must immediately get aus your tinfoil derby to protect you from ze dangerous emanationsof dis phemomana.Da results could be lunacy or vorse.Also dese emanations triggers de hatching of the long dormant eggs of the Looney-tick vich sometimes lay unhatched for yrs awaiting such rays to stimulate zem.The bite of ze looney-tick,while not dangerous may cause ze victim to do strange and hilarious tings in the clear view of their loved ones.The looney-tic can never be completely avoided cuz you never know where they will strike.


EIEIO    Posted 08-26-2002 at 07:09:09       [Reply]  [No Email]
Nut zee teen fueel het egeeen. Bork bork bork! My heed joost noo vent beck tu its nurmel shepe-a. I gooess it is better tu be-a seffe-a thun surry. Bork bork bork! Thunk yuoo su mooch fur illoomeeneting me-a oon thees fery fery srunge-a heppeneeng. I shell immedeeetely sprey fur luuney-teeck feech. Iff yuoo du nut heer frum me-a pleese-a send help becoose-a it cun oonly meun thet zeey luuney-teeck keednepped me-a. I em getteeng my het ploos dooct tepe-a oorunge-a und red tu be-a reel seffe-a.



Promise Land Ranch    Posted 08-26-2002 at 06:36:04       [Reply]  [No Email]
I think that happens when there is a layer of fog or clouds between you and the moon. It could also be that the camera could not quite focus on an object so far away.

Shelby


EIEIO    Posted 08-26-2002 at 07:01:00       [Reply]  [No Email]
What the picture shows is exactly what I saw in the sky. I was amazed that the picture turned out as well as it did.


Mudcat49    Posted 08-26-2002 at 06:22:40       [Reply]  [No Email]
I think it is when there is a layer of ice between the moon and us and the light is shining through the ice.


Grove r    Posted 08-26-2002 at 07:06:05       [Reply]  [No Email]
I think this is called "Transgordial Moonification". caused when sunlight [or lack of] shines through a blanket of inert diamolecular stagnatic mumafar, bending the otherwise inactive predominatric signifiers to react according to mutant protocol, and thus creates the elusive phenomona which you have been subjected to. have a gooder, R.E.L.


Clem    Posted 08-26-2002 at 12:12:33       [Reply]  [Send Email]
You're are absolutely correct once again!! I Think EIEIO needs to start wearing her duct tape and tin foil hat again, because when them signafiers start bending they can cause lots of problem with transplanted to the country but still somewhat city-fied female girls.


EIEIO    Posted 08-26-2002 at 14:33:19       [Reply]  [No Email]
Clem, what is with this somewhat citified girl, I think I am only green and no longer a greenhorn. Heck I even had a conversation at the co-op about castrating our sheep. And yes sir I already put the tinfoil derby and duct tape on as I was told to do this morning.

Well I have to go now and milk my pigs.


Hogman    Posted 08-27-2002 at 05:53:17       [Reply]  [No Email]
Well spoken fair Damsel,a retort worthy of the great Gladstone Himself, I heap praise upon Your lovely brow.


EIEIO    Posted 08-26-2002 at 07:10:38       [Reply]  [No Email]
Sounds good to me, at least I think it sounds good to me!!


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