<http://schema.org/alternativeHeadline>
"Scientists won't be able to confirm that it was an alien moon, so despite discovering more than 1,700 alien planets, they're still looking for their first confirmed exomoon."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/first-exomoon-around-alien-planet-possibly-found>