Even though there is no air in space, astronauts say it has unique smells. For example, the moon smells like gunpowder, and some comets have a strong odor like urine, according to People. People who have been to the moon, like those from the Apollo missions, say it smells like gunpowder and burnt steak. “Everyone’s instant impression of the smell was that of spent gunpowder. Spent gunpowder smell probably was much more implanted in our memories than other comparable odors,” says Apollo 17’s Harrison “Jack” Schmitt, who landed on the moon in 1972. Moon smells like gunpowder and burnt steak (Get…