Was wondering what the width of the image we're seeing is, so I did some quick googling: > The expanding cloud of material left over from the supernova now app

Was wondering what the width of the image we're seeing is, so I did some quick googling: > The expanding cloud of material left over from the supernova now appears approximately 10 light-years (3 pc) across from Earth's perspective https://en.wikipedia.org/wiki/Cassiopeia_A https://en.wikipedia.org/wiki/Cassiopeia_A