I have never seen it

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Rothkko
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I have never seen it

Post by Rothkko » Sun Sep 02, 2012 4:03 am

I have no idea why there is that shadow ... and you?
No tengo ni idea de por qué se produce esa sombra... y tú?
115.jpg
114.jpg
Mosaic 8 photos, 180º
116.jpg
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owlice
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Re: I have never seen it

Post by owlice » Sun Sep 02, 2012 6:44 am

One of the clouds is blocking the sunlight; nothing more than that. Here's another example: http://www.atoptics.co.uk/atoptics/clshad.htm
A closed mouth gathers no foot.

Rothkko
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Re: I have never seen it

Post by Rothkko » Sun Sep 02, 2012 10:37 pm

owlice wrote: nothing more than that. Here's another example http://www.atoptics.co.uk/atoptics/clshad.htm
He had seen many rays and anti-crepuscular rays, but always with the sun above the horizon, as in the image links kindly, but never 20 minutes after having crossed. This, coupled with one of the threads of the clouds in the first escapes the shadow cone appear illuminated, made ​​me wonder.
Había visto muchos rayos y anti-rayos crepusculares, pero siempre con el Sol por encima del horizonte, como en la imagen que amablemente me enlaza, pero nunca 20 minutos después de haberlo cruzado. Esto, sumado a que uno de los hilos de las nubes en primer término se libra del cono de sombra y aparece iluminado, me hizo dudar.

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owlice
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Re: I have never seen it

Post by owlice » Mon Sep 03, 2012 2:06 pm

Here are two APODs which show cloud shadows, one at sunset and one at sunrise:
http://apod.nasa.gov/apod/ap101204.html
http://apod.nasa.gov/apod/ap020227.html
A closed mouth gathers no foot.

Rothkko
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Re: I have never seen it

Post by Rothkko » Mon Sep 03, 2012 5:43 pm