[walrus01]

Telecom satellites in geostationary orbit will remain there on a geological time scale. Human civilization could knock itself down to a bronze age level of technology and rediscover spaceflight long before the orbits of any of them decay.

Some weigh as much as 6500 kg. Including a 100 gram library for PR purposes by a private satellite owner wouldn't be too hard. It's a lot less exotic than saying "the surface of the moon", however.