4.3 apod

these stars are born together near the plane of the Milky Way.  Their numbers steadily dwindle as cluster members are ejected by galactic tides and gravitational interactions. Located about 5,000 light-years away toward the constellation puppis, M46 also seems to contain contradictions to its youthful status. In the picture you can see the planetary nebual NGC 2438 also you can see PK231. . Planetary nebulae are a brief, final phase in the life of a sun-like star a billion years old or more.