Cygnus Loop blast wave animated - HST
A "tantalising veil" in motion - couple of frames four years apart are showing blast wave spreading in space away from supernova, in the region of eastern veil nebula. Images by HST. I was planning to stack two images together when I've realized they are not the same. There is also an object which appears like a star flying in sync with the wave, which could be a chunk of some material or just an…