Hot Jupiter facts for kids
Hot Jupiters are a class of gas giant exoplanets that are physically similar to Jupiter but have very short orbital periods (P < 10 days). 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 51 Pegasi b. Discovered in 1995, it was the first extrasolar planet found orbiting a Sun-like star. 51 Pegasi b has an orbital period of about 4 days.
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Hot Jupiter Facts for Kids. Kiddle Encyclopedia.