Apollo 9’s lunar module was called Spider during its Earth-orbit tests.
Apollo 9 launched on March 3, 1969, with James McDivitt, David Scott, and Russell Schweickart. It was the first crewed flight of a complete Apollo lunar module and command-service-module combination. The crew tested separation, docking, propulsion, and the lunar module’s independent operation while remaining in Earth orbit.
Spider was the call sign of the lunar module, while Gumdrop was the call sign of the command module. Schweickart and Scott also performed a spacewalk to test the portable life-support equipment later needed on the Moon.
Apollo 9 did not travel to the Moon, but its successful tests provided essential confidence before Apollo 10’s lunar-orbit rehearsal and Apollo 11’s landing.