Everybody knows that man has been on the Moon, but not everyone is aware that he treated the place like a picnic area. Over time, the astronauts who visited the Moon managed to leave quite a bit of trash behind.
It is estimated that there’s 181,437 kilograms (about 400,000 lbs) of man-made materials lying around the Moon. Don’t worry, though—it’s not as if the astronauts have been purposely littering the place and throwing sandwich wrappers and banana peels everywhere.
Most of that garbage is debris from various experiments, space probes and lunar rovers. Some of it is, in fact, still functional today. There is also some real trash, however, such as astronaut poop containers. Gross.