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Article
One or more bound planets per Milky Way star from microlensing observations
A statistical analysis of microlensing data from 2002–07 reveals that stars in the Milky Way are orbited by planets as a rule, rather than an exception.
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Article
Discovery of a cool planet of 5.5 Earth masses through gravitational microlensing
Over 170 extrasolar planets have so far been discovered, with a wide range of masses and orbital periods, but until last July no planet of Neptune's mass or less had been detected any more than 0.15 astronomic...