From chandraxray https://twitter.com/chandraxray on Twitter: The most recent supernova explosion in our Milky Way galaxy was seen on Earth about 110 years ago. This exquisite remnant is all that remains... http://chandra.si.edu/photo/2016/g19/ https://twitter.com/chandraxray/status/953975562556661760/photo/1 https://chirp.cooleysekula.net/attachment/47580