What happened to Apollo 9?

Answer 1

Nothing "happened to it". Apollo 9 was a docking test for the Lunar Module (the part that landed on the moon) and Command Module (the part that stayed in lunar orbit waiting for the Lunar Module), and was a complete success except that one EVA test had to be scrapped due to space sickness. If you mean the various pieces of equipment, both pieces of the Lunar Module (the lander and the ascent stage) were left in orbit after the docking tests until they eventually burned up in the atmosphere (in the case of the ascent stage, about a dozen years later; it remained in orbit until 1981), the Service Module (the part with the rocket engines for returning to Earth from lunar orbit) was jettisoned prior to reentry and it also burned up in the atmosphere, and the Command Module splashed down with the astronauts aboard, was recovered, and is on display at the San Diego Air & Space Museum.

Answer 2

Apollo 9 was a manned spaceflight mission in 1969 that tested the Lunar Module (LM) in Earth orbit for the first time. The mission was successful in demonstrating the operation of the LM and its ability to rendezvous and dock with the Command Module (CM). It was a critical step in NASA's preparations for the upcoming Apollo 11 mission that landed humans on the Moon.

Answer 3

Apollo 9 launched on March 3, 1969. the crew spent 10 days in low earth orbit and performed docking and extraction tests of the LM and command module.