Simeis 147

It’s difficult to imagine calling anything 150 light years across “delicate,” but Simeis 147 — a supernova remnant and today’s Astronomy Picture of the Day — certainly qualifies.

It’s easy to get lost following the intricate filaments in this detailed mosaic image of faint supernova remnant Simeis 147. [...] The remarkable composite includes image data taken through narrow-band filters to highlight emission from hydrogen and oxygen atoms tracing regions of shocked, glowing gas.