Cosmic Bubble Wrap


These tenuous threads are part of Sh2-308, a faint and wispy shell of gas located 5,200 light-years away in the constellation of Canis Major. A star known as EZ Canis Majoris was responsible for creating Sh2-308 when it blew off its outer layers. The star’s intense radiation pushes the bubble, blowing it bigger and bigger. The edges of Sh2-308 are about 60 light-years apart and growing.

Image Credit: NASA / ESA

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