The Lunar Module (LM) didn't orbit the moon by itself. It was attached to the Command and Service Module (CSM) during the journey to the moon and was part of the Apollo spacecraft.

Here's why the LM was *part* of the orbiting spacecraft:

* Landing: The LM was designed to land on the moon. Orbiting allowed the astronauts to find a suitable landing site and adjust their approach.

* Fuel Efficiency: The LM had limited fuel. Orbiting allowed them to conserve fuel for the descent to the lunar surface.

* Safety: If the landing attempt failed, the astronauts could return to the orbiting CSM and safely return to Earth.

* Rendezvous: After landing, the LM had to rejoin the orbiting CSM to bring the astronauts back.

So, the LM didn't orbit the moon independently. It was part of a larger system that included the CSM, and the orbiting was a critical step in the overall Apollo mission.