Astronomy Picture of the Day



A Blue Crescent Moon from Space

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zorg.ch
#99178 by @ 21.03.2007 00:00 - nach oben -
A Blue Crescent Moon from Space


Explanation:
What's happening to the Moon?

Drifting around the Earth in 2006 July, astronauts from the
International Space Station (ISS) captured a
crescent Moon floating far beyond the horizon.

The captured above image is interesting because part of the
Moon appears blue,
and because part of the moon appears missing.

Both effects are created by the
Earth's atmosphere.

Air molecules
more efficiently scatter increasingly blue light, making the clear
day sky blue for ground observers, and the horizon blue for astronauts.

Besides reflecting sunlight, these
atmospheric molecules
also deflect moonlight, making the lower part of the moon appear to fade away.

As one looks higher in the
photograph, the increasingly thin atmosphere appears to
fade to black.




Credit & Copyright
zorg.ch
#99179 by @ 21.03.2007 07:32 - nach oben -
ouuuuu wallpaper verdächtig!
zorg.ch
#99180 by @ 21.03.2007 10:15 - nach oben -
jupp... nur, dass ich nie wallpapers verwende, weil ich die eh nicht sehe hinter meinen fenstern.
zorg.ch
#99181 by @ 21.03.2007 15:11 - nach oben -
isch halt s'erscht und einzig ufheiternde am morge nochem ufstarte ^^