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Astrophoto: The North American and Pelican Nebulae by Don Goldman

Submit on Wednesday, July 19th, 2006 06:30

Astrophoto: North American and Pelican Nebulae Image by Don GoldmanClick to enlarge
We live in a universe filled with galaxies. Galaxies are vast gravitationally bound aggregations of hydrogen gas clouds, stars that are produced when part of a cloud collapses under its own enormous weight, atoms that have been ionized by stellar radiation and dust formed from the remnants of previous stars that have either exploded or thrown off their outer layers during old age. Of these, the largest directly observable constituents are the hydrogen gas billows. Older terms survive within the astronomical lexicon. Any extended object in the sky (other than the Sun, Moon, planets and comets) has at one time or another been called a nebula. The root meaning, however, is cloud and it’s now most often used to reference places that contain gas and dust such as the view provided […]

This entry was posted on Wednesday, July 19th, 2006 at 6:30 am and is filed under Astrophotos. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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