Rare, free-floating exoplanet found

By Ashley Yeager, 16:57 PM October 8, 2013

A rare, rogue exoplanet without a parent star drifts through space just 80 light-years from Earth, astronomers say. The object may be the lowest-mass free-floating planet found to date in the solar neighborhood.

The exoplanet, called PSO J318.5-22, is roughly six times the mass of Jupiter and about 12 million years old, relatively young in cosmic age. It has a surface temperature of about 1,100 Kelvin and does not appear to have methane in its atmosphere, which makes it different from other fr...

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