14/09/2015
Loving this...squid?...bat?...something anyways.
APOD: A Giant Squid in the Flying Bat (2015 Sep 11)
Image Credit & Copyright: Steve Cannistra (StarryWonders)
http://apod.nasa.gov/apod/ap150911.html
Explanation: Very faint but also very large on planet Earth's sky, a giant Squid Nebula cataloged as Ou4, and Sh2-129 also known as the Flying Bat Nebula, are both caught in this scene toward the royal constellation Cepheus. Composed with a total of 20 hours of broadband and narrowband data, the telescopic field of view is almost 4 degrees or 8 Full Moons across. Discovered in 2011 by French astro-imager Nicolas Outters, the Squid Nebula's suggestive bipolar shape is distinguished here by the telltale blue-green emission from ionized oxygen atoms. Though apparently completely surrounded by the reddish hydrogen emission region Sh2-129, the true distance and nature of the Squid Nebula have been difficult to determine. Still, a recent investigation suggests Ou4 really does lie within Sh2-129 some 2,300 light-years away. Consistent with that scenario, Ou4 would represent a spectacular outflow driven by a triple system of hot, massive stars, cataloged as HR8119, seen near the center of the nebula. If so, the truly giant Squid Nebula would physically be nearly 50 light-years across.
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Starship Asterisk* • APOD Discussion Page
http://asterisk.apod.com/discuss_apod.php?date=150911