Farewell to an old friend
The Galileo spacecraft completed its mission today by de-orbiting into Jupiter's atmosphere where it disintegrated. NASA took this action to avoid any possibility of, after loosing control of the spacecraft, it colliding with and contaminating Europa or another Jovian moon and compromising the future search for life in the Jovian system. The molecules of this once pioneering spacecraft are now part of the Jovian atmosphere.
Here are the official NASA/JPL news release and an article from Astronomy magazine.