The first footprints put on the moon will probably be there a long, long time—maybe almost as long as the moon itself lasts. Unlike on Earth, there is no erosion by wind or water on the moon. Nothing gets washed away.

Since the Moon has no atmosphere, it is exposed to the solar wind, a stream of charged particles coming from the sun, and over time this acts almost like weather on Earth to scour surfaces on the moon, but the process is very, very slow. The footprints left behind by astronauts on the moon could last 10 to 100 million years.

Possible Preaching Angle:

We all leave behind lasting “footprints” in life. Where we go, what we accomplish, the influence we have on others, these are the permanent legacy that we leave behind us. Let us be careful with the lasting footprints we leave.