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Uranus smells like rotten eggs, scientists find

"If an unfortunate human were ever to descend through Uranus's clouds, they would be met with very unpleasant and odiferous conditions," lead author of a study, published in Nature Astronomy, Professor Patrick Irwin said in a statement .

The composition of Uranus's clouds, and whether their main component was hydrogen sulphide or ammonia, has long been debated.

The scientists found the answer by looking at Uranus through an eight-metre-diametre telescope at the Gemini Observatory in Hawaii, and spotted the noxious gas swirling above its clouds.

But Professor Irwin noted Uranus's bad Smell would be far from the biggest concern for a human visitor.

"Suffocation and exposure in the minus-200-degrees-Celsius atmosphere — made of mostly hydrogen, helium and methane — would take its toll long before the smell," Professor Irwin said.

The differences were likely imprinted in their early history, determined by the conditions where they formed, study co-author Dr Leigh Fletcher said.

"This composition information is invaluable in understanding Uranus' birthplace, evolution and refining models of planetary migrations," the Gemini Observatory said.


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Uranus smells like rotten eggs, scientists find


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