Tuesday, February 15, 2011
A Sunset From Outer Space
This photograph is courtesy of NASA, taken from the International Space Station by the crew of Expedition 15. NASA describes it thus: ..."the Sun's limb still peeks above the distant horizon as seen from Earth orbit. Clouds appear in silhouette as the sunlight is reddened by dust in the dense lower atmosphere. Molecules in the more tenuous upper atmosphere are preferentially scattering blue light".