<http://schema.org/alternativeHeadline>
"NASA invited the public to view its vast Hubble image archive, find the best picture they could, and process the image to make it a beautiful space picture."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/astronomy-teacher-finds-hubble-telescopes-hidden-treasure>