CED 106a

Ced 106a is interstellar matter that is part of the Vela Supernova Remnant, which was formed about 11,000 years ago by a Type II Supernova. It is about 800 light years away.
The image appears to be part of the shockwave (identified from previous images of the SNR) from the ancient stellar explosion that formed the Vela supernova remnant which is still expanding into space. This is colliding with the interstellar medium and compressing it, creating the delicate filaments
The Vela Supernova Remnant is one of the closest supernova remnants to Earth, and has some of the brightest and largest X-ray features in the sky.