Astronauts have described the smell of space with descriptions such as
"seared steak" and "welding fumes."

Astronauts have claimed that outer space smells like hot metal, with a
variety of specific descriptions that depend on the opinions of different
astronauts. Recorded responses among astronauts is that outer space has a
scent similar to welding fumes, gun powder, burnt electrical equipment, and
even seared steak.