This is an amazing image of NGC 2438, a planetary nebula. These are formed by the gaseous clouds cast off by a dying sunlike star. NGC 2438 seems to be located on the outskirts of M46, a star cluster. The star from the planetary nebula seems to move faster then the other cluster stars. This is a cool picture that shows a halo of atomic gas that is around 4.5 light-years away.
http://apod.nasa.gov/apod/ap110407.html
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