Hubble Astronomers Develop a New Use for a Century-Old Relativity Experiment to Measure a White Dwarf's Mass

Wednesday, June 7, 2017 - 11:41 in Astronomy & Space

Astronomers have used the sharp vision of NASA's Hubble Space Telescope to repeat a century-old test of Einstein's general theory of relativity. The team measured the mass of white dwarf Stein 2051B, the burned-out remnant of a normal star, by seeing how much it deflects the light from a background star. The gravitational microlensing method data provide a solid estimate of the white dwarf's mass and yield insights into theories of the structure and composition of the burned-out star.

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