Astronauts reveal for the first time what the unpleasant smell of space is

He outer spacealmost absolute emptiness, hides many secrets. Changes in the laws of physics, little light and a lot of hostility – these are his characteristic seasonings. But one of the mysteries that arouses the greatest curiosity is the understanding that the smell of space.

In this context, astronauts such as Dominic “Tony” Antonelli They defined it as something completely unique.difficult to compare with anything else known on Earth.

What does space smell like?

Astronauts describe the smell of outer space as a mixture hot metal, scorched flesh and spent gunpowder. This can be felt when removing helmets, as the particles responsible for this strange odor stick to their suits.

Although there is not enough air in the room to transmit aromas, This smell permeates spacesuits and equipment after spacewalks.being visible when returning to the ships.

Since then, this phenomenon has become a subject of interest to both the scientific community and the perfume industry.

For his part, astronaut Tim Peake described smell from space in his book Why does space smell like barbecue?. For Peake, the aroma evoked memories such as “sausages grilling on a charcoal grill” or “the smell of static electricity when you quickly take off your clothes.”

This evidence has sparked debate among astronauts, who agree that while the smell may vary depending on individual perception, it is unmistakable and loaded with meaning.

Why does this smell occur in space?

Science has tried to unravel the origin smell from space through several hypotheses:

• Rust on spacesuits: During spacewalks, atomic oxygen (O) molecules present in space stick to astronauts’ suits and instruments. Upon returning to the ship, this oxygen comes into contact with diatomic oxygen (O₂), which can generate ozone (O₃). This process will produce the characteristic metallic or burning aroma that astronauts describe.
• Polycyclic aromatic hydrocarbons (PAHs): Formed in stellar explosions and found in coal and oil, these compounds have also been found in space. It is believed that PAHs can enter equipment during missions, creating an odor reminiscent of burnt or metal products.

Both hypotheses remain the subject of research to confirm their relevance and more accurately determine the reasons.

Can you recreate the scent of space?

Considering the importance of preparing astronauts for all conditions of outer space, NASA decided to repeat smell from space. In 2008, chemist Steve Pearce led a project to create a scent that imitated this scent.

Using descriptions of astronauts and knowledge of aromatic compounds, A formula has been developed that is used in spatial learning.

The scent didn’t just linger throughout training. In 2020, the formula was sold under the name Water Spacefor educational purposes: cultivate interest in science and technology. Perfume allows you to experience a small part of what astronauts perceive in space.

Was later launched O de Lunainspired by the lunar surface. Both fragrances allowed the public to experience the world of space exploration through a unique sensory approach.

What does the International Space Station smell like?

In addition to the outside, astronauts have reported aromas inside the International Space Station (ISS). According to Don Pettit, the ISS environment smells like “a machine shop, an engine room and a laboratory.” This is due to the combination of technical materials, food and other elements present in the station.

This perception supports the idea that odors in space are the result of unique chemical interactions and interactions with the environment.