Astronomers were surprised when they found an unusual element in the atmospheres of two exoplanets

Scientists were very surprised to record traces of barium at high altitudes in the atmospheres of super-hot gas

The giants WASP-76 b and WASP-121 b are two exoplanets that orbit stars outside the solar system.The unexpected discovery raises questions about  what these exotic atmospheres might be like.

As the authors of the study noted, the presence of such a heavy element in the upper atmosphere is "mysterious and illogical."

Both are known as super-hot Jupiters because they are comparable in size to  the gas giant of the Solar System, but have extremely high surface temperatures (more than 1,000°C). This is due to their close proximity to their parent stars.   It takes only one to two days for an exoplanet to orbit its parent stars.This makes the objects so exotic that, for example, in WASP-76 b, it rains iron .

Even so, astronomers were surprised to find barium, which is 2.5 times heavier than iron, on WASP-76 b and WASP-121 b.Given the high gravity of the planets, scientists expect heavy elements such as barium to hit quicklyinto the lower atmosphere.

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