Changes in space travel technology are taking place at lightening speeds. However, things in space might just take a little longer to change than they do on Earth. Since the moon doesn’t have atmosphere — there’s no wind or water to erode or wash away the Apollo astronauts’ mark on the moon. That means their footprints, rover prints, spaceship prints, and discarded materials will stay preserved on the moon for a very long time. They won’t stay on there forever, though. The moon is still in a dynamic environment. It’s actually being constantly bombarded with micrometeorites, which means that erosion is still happening there, just very slowly.