Here’s a different caption from the following website:
An international team may have discovered the very first exomoon orbiting a planet in a distant solar system such as what’s illustrated here in this artist rendition. (NASA/JPL/Cal-Tech)
http://blogs.voanews.com/science-world/2014/04/11/astronomers-may-have-spotted-a-moon-orbiting-an-extrasolar-planet/
