"It's a big puzzle," said Kevin Stevenson, a planetary sciences graduate student at the University of Central Florida in Orlando, lead author of a study appearing tomorrow, April 22 in the journal Nature."Models tell us that the carbon in this planet should be in the form of methane. Theorists are going to be quite busy trying to figure this one out.
An unusual, methane-free world is partially eclipsed by its star in this artist's concept. Credit: NASA/JPL-Caltech