The Flame Nebula and surrounding region.  The bright isolated star is Alnilam.  Alnitak is difficult to see within the bright nebulosity of the Flame Nebula.  The Horsehead Nebula is barely visible at the centre of the image.  NGC 2023 is much clearer at these wavelengths, it is the small bright patch of nebulosity just below the Flame Nebula.  The red arc surrounds σ Orionis.
<br><br>In this WISE image, blue represents 3.4 microns, cyan is 4.6 microns, green is 12 microns, and red is 22 microns.
NASA/JPL-Caltech
2012-07-02 07:34:41
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