The moon has a lot of junk on it, including a gold olive branch, a flag kit, several lunar orbiters, and a hammer and a falcon feather — the components of a 1971 experiment used to demonstrate that objects fall at the same rate regardless of mass.
There are dozens more pieces of lunar debris. But how much garbage, exactly, have humans left or sent to the moon?
It’s challenging to say, but the trash on the moon likely weighs upward of 400,000 lbs. (181,000 kilograms) on Earth. This weight is taken from Wikipedia, but it sounds about right considering that quite a few heavy artifacts, such as five moon rangers, are still there, said William Barry, NASA chief historian.