NGC 7009

Saturn Nebula

NGC7009 is a planetary nebula in the constellation Aquarius.  As with all planetary nebulae, it's the remnant of a red giant star which has ejected its outer gaseous shell leaving behind a hot, dense, white-dwarf star.  It has been estimated that 95% of all stars, including our Sun, will end their lives in this way.  NGC7009 has an estimated distance of 3,900 light years and an apparent diameter of 36".   

   This image is a color composite consisting of individual exposures through white (minus IR), red, green and blue filters (LRGB).  The white (luminance) component is from 85, 10-second subexposures.  RGB exposures were: 130x10sec, 99x10sec, and 68x10sec, respectively.  The image was obtained on 9 September 2002.

Additional information and images can be found at Wikipedia - Saturn Nebula and at the SEDS - Saturn Nebula.

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