Astronomy Picture of the Day: Pioneer 11 crossed the orbit of Neptune...

On this day in 1990, Pioneer 11 crossed the orbit of Neptune, beginning a journey beyond the planets of our solar system. We lost contact with the spacecraft in 1995, leading Pioneer project manager Fred Wirth to say “Pioneer 11 will travel as a ghost ship in our galaxy." pic.twitter.com/juMeZMeBUB

— National Air and Space Museum (@airandspace) February 23, 2022