Researchers say parts of the Moon will be set aside as graveyards for defunct satellites.
Lunar orbit is expected to become increasingly crowded as space agencies plan bases and missions.
Unlike Earth, the Moon has no atmosphere to burn up old spacecraft.
Most dead satellites will eventually need to be crash-landed on the surface.
Scientists warn uncontrolled impacts could damage instruments or historic landing sites.
Designated impact zones would limit debris and protect sensitive areas.
More than 400 lunar missions are planned, including projects led by NASA and the European Space Agency.
International bodies, including the UK Space Agency, are working on disposal guidelines.
Experts say controlled crash sites are the most practical long-term solution.
