<http://schema.org/alternativeHeadline>
"NASA's far-reaching space probe is still within the sun's sphere of influence, but soon will leave into prediscovered areas. The craft has observed a dramatic drop in solar particles and a a high volt of cosmic rays."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/stories/voyager-1-reaches-bizarre-nether-regions-of-solar-system>