How do we know outer space has a specific smell if no one can take their space helmet off to smell it?

Question

How do we know outer space has a specific smell if no one can take their space helmet off to smell it?

In: Planetary Science

Answer 1

The same way you can smell cigarettes on someone even if they’re in a building that no one has ever smoked in. It got on their space suits and when they came inside the smell came with them on their suits. And I imagine being a smell that humans have never encountered before it was probably pretty noticeable.