The ascent stage eventually crashed into the lunar surface nearly a year after the mission.
It consisted of a descent stage and an ascent stage.
One part of the lander, the ascent stage, would then rocket the astronaut off the surface and return him to the waiting spacecraft in orbit.
The ascent stage was to have been used by the crew to return to a lunar orbit from the surface of the moon.
The astronauts would have transferred from the lunar transfer vehicle to the ascent stage.
The descent stage also acted as a launch pad for the ascent stage.
The ascent stage was a smaller cylinder with a rounded top.
It consisted of separate descent and ascent stages, each with its own engine.
However, the effect becomes much more dangerous in the ascent stage of a deep free dive.
The crew of four would ride in the ascent stage.