About half of all sunlike stars host light-weight planets that are less than three times Neptune’s mass. And some of these orbs may be only a few times heavier than Earth.
DISTANT EARTHLIKE PLANETS European astronomers have announced the discovery of 32 additional planets beyond the solar system. One of these planets, shown here in an artist’s illustration, has a minimum mass of six Earths and tightly orbits the low-mass star Gliese 667 C.
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