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Exoplanetary Scratchpad

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White Dwarf 170 ly away in Perseus found to have a debris disk that contains water ice, probable remnants of a water rich asteroid at least 55 miles across. This is the first time water has been detected associated with a rocky body outside the solar system. The star was originally 3 Solar Masses, but ended its Red Giant phase 200 MY ago and shed its outer layer, becoming a white dwarf. It then shred the asteroid with its condensed gravity. The object is estimated to be 26% water, similar to Ceres. This is evidence that the system may have had water bearing habital planets in the past. Similar debris around 12 other white dwarves had been found before, but not with water.

GD 61 System Web Pages[]

GD 61 System In the News[]

Water in Debris Disk Detected (2013)[]

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