<http://schema.org/alternativeHeadline>
"The Red Planet appears on its side in the photo, with the daytime side facing down. Three huge volcano domes are also visible."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/new-mars-photo-christens-esa-deep-space-antenna>