"In a discovery sure to satisfy space artists and sci-fi buffs alike, astronomers have found an alien planet illuminated by three suns. There's just one problem: It shouldn't exist. ...Located 149 light years away in the constellation Cygnus the Swan, it was discovered by planetary scientist Maciej Konacki of the California Institute of Technology in Pasadena with the 10-meter Keck telescope at Mauna Kea, Hawaii. The planet is a classic hot Jupiter, but its mother star is part of a close triple system, which should never have been able to give rise to giant planets in the first place. The reason? The combined gravity of the second and third stars would have kept the gas and dust disk of the primary star at a maximum radius of 200 million kilometers--too close for the formation of giant planets. And if these planets don't form, they obviously can't migrate."