<http://schema.org/about>
"Researchers are posting all exoplanet sightings by the Kepler observatory into a single, comprehensive website called the NASA Exoplanet Archive."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/nasas-alien-planet-archive-now-open-to-the-world>