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Earth at Twilight (photo)

Posted on Saturday, June 11 2005 @ 20:14:59 CEST by


The astronomy picture of the day is a beautiful view of Earth at dusk, taken by the crew of the International Space Station (ISS). It was taken four years ago while orbiting at an altitude of 211 nautical miles. Here's some more information:

No sudden, sharp boundary marks the passage of day into night in this gorgeous view of ocean and clouds over our fair planet Earth. Instead, the shadow line or terminator is diffuse and shows the gradual transition to darkness we experience as twilight.



With the Sun illuminating the scene from the right, the cloud tops reflect gently reddened sunlight filtered through the dusty troposphere, the lowest layer of the planet's nurturing atmosphere. A clear high altitude layer, visible along the dayside's upper edge, scatters blue sunlight and fades into the blackness of space.


 



 

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