A Ghostly Star Revealed in Silhouette

Science  08 Dec 2006:
Vol. 314, Issue 5805, pp. 1550-1551
DOI: 10.1126/science.1135545

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One class of binary stars, in which white dwarfs accrete material from low-mass companions, has long been predicted, but their dimness has made observations difficult. Evidence that they exist now comes from the Sloan Digital Sky Survey.