Humans aren’t the cleanest animals. Sure, most of us keep our bodies clean, but we’re not all that great at keeping the world around us litter-free.
Naturally, man would be just as messy on other planets.
As of 2012, NASA’s has counted over 800 manmade objects on the Moon. Spacecraft make up the bulk of our moon litter but there’s a wide variety of “artifacts” left up in space.
The 809 Objects Left on the Moon