<http://schema.org/description>
"Beta Pictoris b, and its confirmed eight-hour day, is the first alien planet to have its rotation speed successfully clocked by astronomers."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Science_News/2014/04/30/Astronomers-measure-length-of-a-day-on-alien-planet-a-first/9241398881034/?spt=sec&or=sn>