A gas giant half the size of Jupiter has been discovered orbiting a tiny red dwarf star one-tenth the size of our sun, about 30 light-years from Earth. This mismatched pair of a tiny star and a huge planet challenges a leading theory of planetary formation.

A gas giant half the size of Jupiter has been discovered orbiting a tiny red dwarf star one-tenth the size of our sun, about 30 light-years from Earth. This mismatched pair of a tiny star and a huge planet challenges a leading theory of planetary formation.

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