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04-16-2004, 09:33 AM
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Ma'at - Goddess of Truth & Justice
 Join Date: September 15, 2002
Location: Kennewick, WA
Age: 52
Posts: 3,166
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Found this at Space.com. Interesting, and beutifull. Could you imagine taking a photo like this?
 "Editor's Note: In this picture, taken May 11 with a digital camera from the International Space Station, the Moon seems to float inside Earth's atmosphere. Writing for NASA, Tony Phillips explains what might be going on: It's an illusion, of course. The Moon is really a quarter of a million miles away. The picture is tricky because of its uneven lighting. The Sun's elevation angle is only 6 degrees. On the left side of the image, night is falling; on the right side, it's still broad daylight. This gradient of sunlight is the key to the illusion. Atmospheric optics expert Les Cowley explains: "The Moon is close to Earth's terminator, so the atmosphere in front of it is not receiving much sunlight." Sunlit air scatters light and glows blue. "We call this 'airlight,'" says Cowley. "But in this image the air in front of the Moon is only dimly lit. The Moon is therefore clear and bright because it is not masked by superimposed airlight." "This makes the Moon seem to be 'in front' of the atmosphere." Uneven lighting reinforces the illusion in another way: On the sunlit side of the image (right), the boundary between air and land is distinct. Our brains extrapolate the direction of Earth's limb, right to left, using information mostly from that sunlit area. But the brain does it wrong. The extrapolated limb goes behind the Moon; so the Moon seems to be in the foreground, floating on air. This idea, suggested by the author. Whatever the explanation, the illusion is wonderful. And unexpected. It makes you wonder ... what's next?"
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04-16-2004, 11:29 AM
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40th Level Warrior
 Join Date: March 24, 2002
Posts: 10,215
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nice picture. though i can't imagine that little thing is the moon.
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04-16-2004, 12:16 PM
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Manshoon
 Join Date: November 7, 2003
Location: Mississauga, Ontario, Canada
Age: 51
Posts: 211
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Oh damn... that's nice. I like the nebula pics that were taken by the Hubble.
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~ Ehrys ~<br /><br />\"Learn from the mistakes of others, as you don\'t live long enough to make them all yourself.\" |
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04-16-2004, 05:42 PM
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Zartan
 Join Date: May 20, 2003
Location: Near Aberdeen, Scotland
Age: 34
Posts: 5,225
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cool! They must have amazing digi cams up there for quality such as that!
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[img]\"http://img.ranchoweb.com/images/ladyzekke/dragonwater2.gif\" alt=\" - \" /> |
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04-16-2004, 06:20 PM
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#5 | |
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Ma'at - Goddess of Truth & Justice
Join Date: September 15, 2002
Location: Kennewick, WA
Age: 52
Posts: 3,166
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Quote:
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