Scientists are analyzing smells in space to understand the universe's composition, examining everything from nearby planets to distant galaxies.
Marina Barcenilla, a space scientist, aroma designer, and astrobiology Ph.D. student, has designed aromas recreating space smells for exhibits. Planets, moons, and gas clouds each have unique scents that could reveal cosmic secrets.
The Smell of Space
Astronauts report a distinct metallic smell on space stations after spacewalks, often described as burnt meat or gunpowder. One theory suggests this is due to atomic oxygen reacting and forming ozone.
The James Webb Space Telescope (JWST) detected carbon dioxide in the atmosphere of exoplanet WASP-39 b. Chemical analysis suggests Titan, Saturn's largest moon, might smell like sweet almonds, gasoline, and rotting fish.
In 2023, potential life-related scents were detected on K2-18b. In 2025, reanalysis of its atmosphere revealed stronger evidence of gases produced by marine life, suggesting a potentially "life-filled" ocean, though further research is needed.
Many space smells are familiar on Earth. Upon returning to Earth, astronaut Helen Sharman recalled the intoxicating smell of fresh air and crushed vegetation, emphasizing the unique and irreplaceable scents of our own planet.