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LOS ANGELES (AP) - NASA's Spitzer Space Telescope has spotted a dusty disc of material around a very small "failed star" called a brown dwarf, raising the possibility that there may be miniature solar systems in which planets orbit objects not much larger than planets, scientists said Monday. The brown dwarf named OTS 44 is only about 15 times the mass of Jupiter, much smaller than any other brown dwarf known to be surrounded by a disc of planet-building material, said Kevin Luhman, lead author of a study by the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass. "The neat thing...

The photo of a nearby star and its orbiting companion -- whose temperature is like a hot summer day in Arizona -- will be presented by Penn State Associate Professor of Astronomy and Astrophysics Kevin Luhman during the Signposts of Planets conference at NASA's Goddard Space Flight Center on 20 October 2011. A paper describing the discovery will be published in the Astrophysical Journal. "This planet-like companion is the coldest object ever directly photographed outside our solar system," said Luhman, who led the discovery team. "Its mass is about the same as many of the known extra-solar planets -- about...