The Economic Times

Astronauts returning from spacewalks say space leaves a smell on their suits; NASA crews have compared it with metal, gunpowder, and ozone

After returning from spacewalks, astronauts frequently describe an odd aroma, reminiscent of burnt gunpowder or charred meat. This mysterious scent, which has baffled researchers for many years, is currently the subject of investigation. One hypothesis points to the interaction of oxygen atoms with spacesuits in orbit, while another suggests the involvement of soot-like particles from dying stars. This enigma underscores our limited understanding of essential elements of space exploration.