"The Aroma of Space: Unveiling the Cosmic Scent"
Astronauts have reported smelling ozone, burnt steak, and gunpowder-like odors after spacewalks, likely due to the chemistry of space interacting with their spacesuits. Space is not completely odorless, with molecules like polycyclic aromatic hydrocarbons (PAHs) found in charred food also occurring in space. Different cosmic locations have unique odors, such as the rotten egg and urine-like smell of comet 67P/Churyumov-Gerasimenko and the gasoline-like scent of Saturn's moon Titan. Even interstellar clouds like Sagittarius B2 contain aromatic chemistry, with the presence of alcohol and ethyl formate, which gives raspberries and rum their sweet fragrances.