Scientists have discovered a planet that is way too big for its tiny star. Its existence could upend everything we thought we knew about how solar systems form, researchers say.
The ultra-cool dwarf star, named LHS 3154, lies 51 light-years from our solar system and is about nine times less massive than our sun. In contrast, its planet, LHS 3154b, is 13 times more massive than Earth. That sort of cosmic mismatch is previously unheard of — the astronomical equivalent of finding a watermelon on a grapevine.
