WASP-193b

WASP-193b is an exoplanet orbiting the Sun-like star WASP-193, located approximately 1,200 light-years away in the constellation Lyra. It is classified as a hot Jupiter, a type of gas giant exoplanet that is physically similar to Jupiter but has a very short orbital period, placing it extremely close to its host star.

WASP-193b is notable for its extremely low density. Studies have shown it to have a density of approximately 0.059 grams per cubic centimeter, making it one of the least dense exoplanets discovered to date. This density is comparable to that of cotton candy or Styrofoam. This extraordinarily low density poses challenges to current models of planetary formation and structure, suggesting that the planet may have an unusually thick atmosphere or possess a different internal structure than previously thought for hot Jupiters.

The planet's mass is roughly 0.114 times the mass of Jupiter, while its radius is about 1.5 times that of Jupiter. The combination of this relatively low mass and large radius contributes to its remarkably low density. It orbits its host star WASP-193 with a period of approximately 6.25 days.

Further research and observation are needed to fully understand the composition and formation of WASP-193b and to determine what mechanisms could explain its unusually low density. Studies of its atmosphere, using techniques like transmission spectroscopy, could potentially reveal the presence of heavier elements or unusual atmospheric processes contributing to its puffed-up state.