Friday, September 16, 2011

APOD 1.3

Great Orion Nebulae:

     Great Orion Nebulae include the Great Nebula in Orion (M42) and also a smaller nebula such as NGC 1977 (M43).  At the center of M42 and M43 exists a giant, interstellar gas and dust cloud. The cloud spans several hundered light years across and was formed by a density wave.  From reading about these two nebulae, I learned that astronomers have detected what they believe to be infant planetary systems within the nebulae.  However, astronomers also found that the disks (what would be future planets) are being blasted with UV radiation from the brightest star in the region, which makes planetary formation difficult.  One thing I found amazing is that Orion's Nebula's approximate distance is about 1,500 lightyears.

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