What's this? (Image puzzle)

E.T · March 2004

So can anyone guess what this is?

[img]http://koti.mbnet.fi/~tuunaes/temp/PICT2802.jpg[/img]

Maybe this "enlightens" things. :D

[img]http://koti.mbnet.fi/~tuunaes/temp/PICT2795.jpg[/img]

the_exile · March 2004

A nuclear missile exploding in the air?

Eclecticonaut · March 2004

It's an atmospheric halo. :)

Btw, that is the Moon in the first picture?

C_Mon · March 2004

Yeah, saw one halo once around the moon. Didn't notice it at first because it was so big.

Biggles · March 2004

Looks like an overexposed photo of the full moon showing its halo to me.

E.T · March 2004

You seem to be much more intelligent than my sister. :D

She didn't recognize it as moon even when there was one photo about half moon among pics I took and I said that I didn't change direction of camera between shots.

I took that moon pic with just couple hours ago.
There were pretty good cirrostratus clouds today. (well, let's put it: now it was yesterday)

But I would have thought that there would have also been nice parhelias (sundogs).

[url]http://www.sundog.clara.co.uk/halo/halosim.htm[/url]
So what halos are there in day photo?

PICT2802.jpgExifImage DescriptionDCF 1.0MakeMinolta Co., Ltd.ModelDiMAGE 7iOrientationtop, left sideX Resolution1/72 inchesY Resolution1/72 inchesResolution UnitInchesSoftwareVer.1.11eDate/Time2004:03:29 20:59:59YCbCr PositioningCenter of pixel arrayExposure Time20 sec
F-NumberF2,8Exposure ProgramManual controlISO Speed Ratings200Exif Version2.20Date/Time Original2004:03:29 20:59:59Date/Time Digitized2004:03:29 20:59:59Components ConfigurationYCbCrBrightness Value536870737/10Exposure Bias Value0Max Aperture ValueF2,8Metering ModeMulti-segmentLight SourceDaylightFlashUnknown (16)Focal Length7,27 mmSubject Location1280 960 2560 1920FlashPix Version1.00Color SpacesRGBExif Image Width2560 pixelsExif Image Height1920 pixelsCompressionJPEG compressionThumbnail Offset13186 bytesThumbnail Length1437 bytesThumbnail Data[1437 bytes of thumbnail data]InteroperabilityInteroperability IndexRecommended Exif Interoperability Rules (ExifR98)Interoperability Version1.00generated by EXIF-O-Matic on 2004.3.29
PICT2795.jpgExifImage DescriptionDCF 1.0MakeMinolta Co., Ltd.ModelDiMAGE 7iOrientationtop, left sideX Resolution1/72 inchesY Resolution1/72 inchesResolution UnitInchesSoftwareVer.1.11eDate/Time2004:03:29 15:00:59YCbCr PositioningCenter of pixel arrayExposure Time 1/1500 secF-NumberF8Exposure ProgramManual controlISO Speed Ratings100Exif Version2.20Date/Time Original2004:03:29 15:00:59Date/Time Digitized2004:03:29 15:00:59Components ConfigurationYCbCrBrightness Value12.8Exposure Bias Value0Max Aperture ValueF2,8Metering ModeMulti-segmentLight SourceDaylightFlashUnknown (16)Focal Length7,27 mmSubject Location1280 960 320 192FlashPix Version1.00Color SpacesRGBExif Image Width2560 pixelsExif Image Height1920 pixelsCompressionJPEG compressionThumbnail Offset13186 bytesThumbnail Length2133 bytesThumbnail Data[2133 bytes of thumbnail data]InteroperabilityInteroperability IndexRecommended Exif Interoperability Rules (ExifR98)Interoperability Version1.00generated by EXIF-O-Matic on 2004.3.29

E.T · March 2004

BTW, does anyone recognice which constellations there are in that night photo?
(should be easy for those who live on northern hemisphere)

There's also one planet on this pic.:D
(that star which doesn't belong this area)

Eclecticonaut · March 2004

[QUOTE][i]Originally posted by E.T [/i]
[B]BTW, does anyone recognice which constellations there are in that night photo?
(should be easy for those who live on northern hemisphere)

There's also one planet on this pic.:D
(that star which doesn't belong this area) [/B][/QUOTE]
The Twins (Gemini) and Saturn (yes, I [url="http://www.ursa.fi/extra/taivaalla/tahtikartta/"]cheated[/url]). =)

A2597 · March 2004

Wow...

I can't honestly say I have never seen a halo that large around the moon...

a halo, yes. but not THAT big...wow.

Biggles · March 2004

Really? I see them like that quite often during the winter here.

A2597 · March 2004

hmm...interesting...

look cool though. Maybe I'll see them when I'm in illinois for Chiro training...

but in Florida...never saw one.

See lots of shooting stars though

MartianDust · March 2004

Can't believe even I got that.

E.T · March 2004

[QUOTE][i]Originally posted by A2597 [/i]
[B]a halo, yes. but not THAT big...wow. [/B][/QUOTE]
That's corona you've seen:
[url]http://www.sundog.clara.co.uk/droplets/corona.htm[/url]

This 22° circular halo with parhelias are those which are seen most often.
[url]http://www.sundog.clara.co.uk/halo/circular.htm[/url]
[url]http://www.sundog.clara.co.uk/halo/parhelia.htm[/url]
At best parhelias can be almost as bright as sun itself.

So what halos there are in day photo? (three of them)

More about Halos
[url]http://www.ursa.fi/ursa/jaostot/halot/english.html[/url]
[url]http://www.ursa.fi/ursa/jaostot/halot/eng/photos.html[/url]

There's one pretty bright parhelia in one photo: (also nice auroras)
[url]http://www.teknofokus.fi/Foto/Omat/HMkuva.htm[/url]
[url]http://www.teknofokus.fi/Foto/Haloja/Halo10huhti.htm[/url]

These can be also nice:[img]http://www.ursa.fi/ursa/jaostot/halot/umi/2002/302fig09.jpg[/img]

E.T · March 2004

[QUOTE][i]Originally posted by Eclecticonaut [/i]
[B]The Twins (Gemini) and Saturn (yes, I [url="http://www.ursa.fi/extra/taivaalla/tahtikartta/"]cheated[/url]). =) [/B][/QUOTE]
You forgot something: I said "constellations".
(Capella is brightest star in that constellation)

Those two stars left and above moon are Twin's Castor and Pollux.

Eclecticonaut · March 2004

Alpha Auriga is actually a double star, one of the closest ones too. But I don't care what constellations you can see at the same time, the halo itself is most important.

MartianDust · March 2004

I have a question regarding the moon thats puzzled me and others for yrs.
That when its rising just above the horizon why it looks so much bigger yet obviously its the same distance? And why when it sets it goes darker? Am sure its to do with atmosphere. Plus last summer I think it was for some reason when the moon way high in the sky it looked even smaller than other times when its that high?! But my main question is why it appears bigger on horizon.
:)

Phi · March 2004

Because you've got stuff to compare it to :) At least, that's what people have told me. To prove to yourself that it's always the same size, take a coin that just covers the moon near the horizon when held at arms length. Wait a few hours and try it again.

-Φ

Biggles · March 2004

What Phi said is essentially right. The brain compares it to stuff that is much much closer (ie the land at or near the horizon), and so it appears to be larger.

RedAssAg05 · March 2004

...it's not just a mind trick though...it's also the diffusion of light through a greater amount of atmosphere, enhancing the moon's image. the particles in the atmosphere often give the moon an orangish hue when it rises, as well.

MartianDust · March 2004

Cool! I thought it was going to be more scientifically complicated than that!
I will definitely try the coin trick. Though not out in public somewhere. ;)
Thanks

E.T · April 2004

[url]http://www.spacedaily.com/news/lunar-00a.html[/url]

This is good one:
[url]http://www.space.com/scienceastronomy/solarsystem/bigmoon_000105.html[/url]

MartianDust · April 2004

Thanks ET, A good read and it lead me onto other interesting stuff. :)

Though regarding the Moon they didn't explain this:

"Last month's winter-solstice full moon may have been the biggest and brightest in decades, "

Now why is it brighter then in decades? They make it sound like this isn't an illusion though it must be of course. Just confused me a little.

Good illusion of moon at dawn that I took last month.
[url]http://www.davidbowie.com/users/martiandust2002/MoonIllusioncopy.jpg[/url]

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