フォーマルハウトb
The true nature of Fomalhaut b is the subject of significant debate. Fomalhaut b was initially identified as one of the first exoplanets to be directly imaged: its detection was attributed to reflected light from circumplanetary material (e.g. a dust ring) and thermal emission from a jovian planet atmosphere. Fomalhaut b has subsequently been described as a low-mass planet whose surrounding dust cloud is entirely responsible for its detection or, most recently, debris from a collision of asteroids instead.