https://apnews.com/article/brown-dwarf-gliese-229b-614b24f9c9fa2e8c9c2f17158a8e817d > NEW YORK (AP) — A celestial object discovered decades ago is actually twins orbiting each other, a new study confirms. > Scientists have puzzled over the object known as Gliese 229B, the first known brown dwarf discovered 30 years ago. Brown dwarfs are sometimes called failed stars because they're lighter than stars, but heavier than gas giant planets.