<http://schema.org/about>
"Beautiful images just published by NASA show our planet in the dark of night, but still lit up by human-made lights, all thanks to the latest in satellite technology. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/slideshows/clean-technology/nasas-black-marble-photos-earth-night/>