What does the universe smell like?

Since outer space is as close to a vacuum as possible, it seems that it does not smell, but strictly speaking, there are a few molecules. By scenting the few molecules floating in the universe, humans can feel the 'smell of the universe,' and astronauts actually testify that 'the universe had a unique scent.' Popular Science, an American scientific information magazine, explains what the universe smells like.

What does space smell like? | Popular Science
https://www.popsci.com/science/article/2013-07/what-does-space-smell/

Miles O'Brien, a space correspondent on American news media CNN, and Peggy Whitson , the first woman to be the captain of the International Space Station (ISS), said in a 2002 conversation , 'I shot a gun. It was likened to the smell of the latter. ' Former astronaut Chris Hadfield testified that 'the universe smells like sulfur, as if the witch was just there.'

Former astronaut Thomas Jones, who has experienced three EVAs, said, 'When you repressurize the airlock and get out of the suit, there is a clear ozone odor and a faint pungent odor.' It only happens on shuttles or space stations after spacewalks, 'he told Space.com, a space news site.

Arnaud Velosh, an astronomer at the Max Planck Institute for Radio Astronomy, analyzed radio waves from the nebula in the center of the galaxy and found that a substance called ' ethyl formate ' was present. This ethyl formate is said to be the source of the flavor of raspberries and rum, and the flavor tea 'SPACE TEA' that reproduces the scent of the universe was developed based on this discovery by Mr. Velosh.

Flavored tea 'SPACE TEA' tasting review that reproduces 'the scent of the universe' --GIGAZINE

Matt Richmond, the product manager of 'Perfume that reproduces the scent of the universe,' which became a hot topic after soliciting investment from the crowdfunding service Kickstarter in 2020, also said, 'Steak, raspberry, rum with explosives and surface. It is clarified that the incense was adjusted with the concept of 'a mixed smell'.

Eau de Space
https://eaudespace.com/

Luis Allamandra, director of the NASA Ames Research Center Astrophysics and Astrochemistry Institute, states that the scent of the universe is based on ' polycyclic aromatic hydrocarbons.' Polycyclic aromatic hydrocarbons are also contained in comets and cosmic dust, and the molecules of polycyclic aromatic hydrocarbons are floating in outer space and are performing extravehicular activities on the ISS. It adheres to the aviator's clothes. Therefore, the moment you return to the ISS and take off your spacesuit, you can feel the 'smell of the universe.' Polycyclic aromatic hydrocarbons are also abundant in fossil fuel and biomass fuel by-products and heat-treated foods, so it's easy to say 'smell like a steak with explosives and surface'. Hmm.

According to Mr. Allamandra, the scent of the universe varies from place to place, and the area around the solar system where humans live is rich in carbon and low in oxygen, so it is expected that the scent will be particularly stimulating. 'In the dark parts of the universe, there are molecular clouds full of cosmic dust, which give off a buffet-style restaurant-like scent, from the scent of sweet sugar to the rotten smell of eggs,' said Allamandra. It is thought that. '