I feel dirty posting this - but- Science says Uranus smells

Astronomers have finally figured out what the clouds of Uranus consist of - and as it turns out, they smell terrible. For the first time, there's been a clear detection of hydrogen sulfide, the gas that gives rotten eggs - and flatulence - their distinctive aroma.

In spite of decades of observations, the composition of Uranus's clouds has been pretty hard to pin down.

We know there's methane in the atmosphere, because that's what makes the planet such a pretty blue colour (methane is odourless).

We also know there's hydrogen and helium because of observations made by the Voyager 2 probe when it flew past.

But the concentration of other compounds, such as water, ammonia and hydrogen sulfide, has been a bit more difficult to determine, since the planet is so far away and so faint in our telescopes.

....
But equipment and techniques are improving all the time - and an international team of astronomers have found a new way to use the powerful Gemini telescope to peer into Uranus.



https://www.sciencealert.com/uranus-smells-terrible-hydrogen-sulfide-spectroscopic-analysis?perpetual=yes&limitstart=1