The temperature on Kelt-9b is 4,000C and its atmosphere contains iron and titanium vapours, say astronomers

New observations of the hottest known planet have revealed temperatures similar to those typically seen at the surface of a star, as well as an atmosphere of vaporised iron and titanium.

The findings add to the diverse and, in some cases, extreme conditions seen on planets far beyond our own solar system.

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Read More Hottest of ‘ultra-hot’ planets is so hot its air contains vaporised metal

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