<http://schema.org/about>
"Black holes are amongst the most powerful and mysterious objects in the universe \u2014\u00A0what is left behind after a star has collapsed. NASA has compiled several"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/space/photos/10-incredible-images-of-black-holes/slingshot-effect>