WASHINGTON (AP) — A new study says a planet outside our solar system thought to be in the so-called Goldilocks zone is not even a real planet, but a cosmic masquerade.

Four years ago, scientists proclaimed they found what could be the first planet outside our solar system in the habitable zone around its star — not too hot and not too cold for life. Now, other researchers have shown that what was found, Gliese 581 g, wasn’t a planet.