Hot Jupiter

Hot Jupiters are a class of gas giant exoplanets that are physically similar to Jupiter but have very short orbital periods (). The closeness to their stars and their high surface-atmosphere temperatures led to the nickname.
Hot Jupiters are the easiest extrasolar planets to detect via the radial-velocity method. The oscillations they induce in their parent stars' motion are large and rapid compared to those of other types of planets. One of the best-known hot Jupiters is . Discovered in 1995, it was the first extrasolar planet found orbiting a Sun-like star. has an orbital period of about 4 days.