HD 189733 b, discovered in 2005, is a Hot Jupiter ~1.1 times Jupiter’s size orbiting a K-type star every 2.2 days. Deep blue from silicate haze, it rains molten glass in 5,400 mph winds.
Dayside ~1,800°F (1,000°C)—extreme weather lab with no life possible.
One of the best-studied exoplanets, it revealed how wild gas giants can get.