First Extrasolar Planet Under Three Suns

Maciej Konacki, a senior postdoctoral scholar in planetary science at Caltech, discovered the unusual hot Jupiter orbiting the main star of the close, triple-star system known as HD 188753, using the 10-meter Keck I telescope atop Mauna Kea in Hawaii.
A hot Jupiter is a giant planet with an orbital period of between 3 and 9 days. “Like many other hot Jupiters from binary or multiple stellar systems, it has a larger mass than a typical hot Jupiter orbiting a single star. Otherwise, this system is unique,” Konacki wrote in his report, published today in Nature.
ESPs: California Scientist Discovers First Extrasolar Planet Under Three Suns