WASP-189b is a fascinating exoplanet, classified as an ultra-hot Jupiter. Here's a brief overview:

Type: Gas giant.

Mass: Almost 2 times the mass of Jupiter.

Size: About 1.6 times the size of Jupiter.

Orbit: Orbits its host star, WASP-189 (HD 133112), in just 2.7 days, placing it extremely close to its star.

Host star: WASP-189 (HD 133112) is a bright, hot A-type star, larger and hotter than our Sun.

Extreme Temperature: Due to its proximity to the star, WASP-189b has a dayside temperature of about 3200°C (3500K). This makes it one of the hottest known exoplanets, hot enough to vaporize iron.

Unique Atmosphere: It has a complex atmosphere containing various elements, including titanium oxide, iron, chromium, vanadium, magnesium, and manganese. The presence of titanium oxide suggests a layer in the atmosphere that may interact with stellar radiation similarly to how Earth's ozone layer does. Studies using high-resolution spectroscopy have revealed evidence of a layered atmosphere and dynamics like winds.

Polar Orbit: WASP-189b orbits its star in a peculiar, inclined or "polar" orbit, meaning it passes close to the star's poles rather than its equator. This polar orbit around an oblate star may indicate a history of gravitational interactions within the system.

Significance: WASP-189b provides a unique opportunity to study extreme exoplanet atmospheres and star-planet interactions due to its brightness and extreme conditions.