Sunset from Space

To celebrate the equinox, consider this colorful view of the setting Sun. Recorded last June from the International Space Station, 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.

Go to Astronomy Picture of the Day to see it full-size. Link -via Digg

(image credit: Expedition 15 Crew, NASA)