Is there a planet more than 4000 degrees Fahrenheit?

Yes, there are exoplanets with surface temperatures exceeding 4000 degrees Fahrenheit (about 2200 degrees Celsius). For example, some "hot Jupiters," which are gas giants located close to their stars, can achieve extremely high temperatures due to intense radiation from their host stars. One such example is KELT-9b, which has been measured to have temperatures around 7000 degrees Fahrenheit (approximately 3700 degrees Celsius). These extreme conditions contribute to unique atmospheric and physical characteristics.