Puppis A (top right) - The remnant of a supernova, spanning 10 light years across and located 70,000 light years away. The light from the supernova itself would have been visible to the human eye around 1700 BC. Image Credit: NASA/Don Goldman via APOD [2500x2500]

http://bit.ly/2NJeTa5 via /r/spaceporn http://bit.ly/36Y5lQ7