Apollo 9 was the third manned mission in the US Apollo program. It was launched on March 3, 1969, and marked the first manned flight of the Lunar Module (LM) and tested all of its systems in Earth orbit. The crew consisted of three astronauts: James A. McDivitt, David R. Scott, and Russell L. Schweickart. The mission was successful and provided valuable data for future lunar landings.
Apollo 9 was a crucial test mission for the Apollo program, as it marked the first manned flight of the Lunar Module. The crew conducted several spacewalks, including one by Schweickart in the LM's "space suit," which tested the mobility and functionality of the suits in a weightless environment. The mission also tested the Lunar Module's rendezvous and docking capabilities with the Command/Service Module (CSM). Apollo 9 marked a significant step towards the ultimate goal of landing a man on the moon. The mission was considered a success and paved the way for future manned missions to the moon.