If the large, rocky planet is losing helium, then we can infer what is left behind.
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A Jupiter-size planet that escaped its star's death
It's unclear how the planet avoided its star's bloated red giant stage.
Read MoreIf the large, rocky planet is losing helium, then we can infer what is left behind.
Read MoreIt's unclear how the planet avoided its star's bloated red giant stage.
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