Alien asteroid dust hints at Earth-like planets
By mozez • Jan 14th, 2009White dwarfs can chew apart errant asteroids, leaving only dusty remains. New infrared observations suggest the dust left behind in six such stars has a composition similar to rocky objects in the inner solar system, suggesting the stars may have hosted rocky planets. (Illustration: NASA/JPL-Caltech)
Dust made up of similar stuff as the Earth has been [...]
