This barrier of light is about 2,400 light-years from Earth in the constellation Cygnus and is part of a massive structure called the Cygnus Loop. The full structure covers a portion of the sky 36 ...
source https://www.desainpremium.com/2019/08/the-amazing-new-shockwave-torch-makes.html#966b2894f4e382f192d29a6effbbd676
