<http://schema.org/alternativeHeadline>
"The shiny star is a Cepheid variable, a type of unstable star with very little hydrogen fuel left in its core."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/celestial-holiday-wreath-shines-in-hubble-photo>