Source: Space Daily

Artist conception of the unique binary star NLTT 11748.
Credit: Steve Howell/Pete Marenfeld/NOAO
Santa Barbara CA (SPX) May 19, 2010 Astrophysicists at UC Santa Barbara are the first scientists to identify two white dwarf stars in an eclipsing binary system, allowing for the first direct radius measurement of a rare white dwarf composed of pure helium.
The results will be published in the Astrophysical Journal Letters. These observations are the first to confirm a theory about a certain type of white dwarf star. (read more)