Celestial hemisphere:  Northern  ·  Constellation: Auriga (Aur)  ·  Contains:  LBN 769  ·  Sh2-224
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Supernova Remnant Sharpless 224 in HOO, M.J. Post
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Supernova Remnant Sharpless 224 in HOO

Getting plate-solving status, please wait...
Supernova Remnant Sharpless 224 in HOO, M.J. Post
Powered byPixInsight

Supernova Remnant Sharpless 224 in HOO

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Description

Here is a very faint and oddly-shaped remnant of a supernova, located about 3.5 deg SSE of Capella and nearly 15,000 l.y. away.  Stuart Sharpless designated it SH2-224.  It is nearly one degree wide.

It is postulated that a massive star exploded and created a bubble-like structure that expanded rapidly into the surrounding interstellar medium (ISM).  But there was a sharp, high-to-low density gradient in the ISM and the bubble rapidly filled that channel, creating a "wing" shape.   Who knows what really happened, but someone thought that up!

Four hours exposure each, H-alpha and O III filters

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Supernova Remnant Sharpless 224 in HOO, M.J. Post

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