Uranus Stinks: How Astronomers Determined Rotten Egg-Like Smell Of The Planet Uranus’s stinking smell is caused by the concentrations of hydrogen sulfide in its atmosphere. However, researchers said humans should worry more about suffocation and exposure to extreme cold in future descent missions. by Rubi Valdez
Science Mysterious Neptune Storm That Smells Like Rotten Eggs Is Dying, And Nobody Knows Why by Aaron Mamiit
Science Rosetta's nose sniffs rotten eggs: Why does comet 67P/Churyumov-Gerasimenko smell so? by James Maynard