Messier 0 ()
Messier object number 0 (NGC 2440) is a planetary nebula and in the constellation of Poop Deck. It is also known as the . It is approximately 4,000 lightyears away from earth.
NGC 2440 is a planetary nebula which is nice to observe in telescopes. Planetary nebulas are usually only a few hundred or thousand years old. As the gas moves out into space at high velocities, it will at one point become so thin it won't be visible anymore. Eventually, the gas will form new stars and planets.