A few dozen such objects have been identified in recent years but this is the first set of "twins".Read more over here.
Dubbed "planemos", they circle each other rather than orbiting a star.
Their existence challenges current theories about the formation of planets and stars, astronomers report in the journal Science.
"This is a truly remarkable pair of twins - each having only about 1% the mass of our Sun," said Ray Jayawardhana of the University of Toronto, co-author of the Science paper.
Strange twin planets found
Posted on Saturday, Aug 05 2006 @ 14:01 CEST by Thomas De Maesschalck
Scientists have discovered a pair of strange worlds that blur the boundaries between planets and stars: