This is a detailed image of an exploded star called Cassiopeia A, taken by the Chandra X-Ray Observatory. The space-based observatory focused on this remnant for 1 million seconds (just over 11 days), and revealed the bright outer green ring 10 light years across which was generated by the shockwave from the supernova explosion. Two large jets extend outside this shockwave on opposite sides, and contain large quantities of silicon. This means they were formed early on in the explosion; otherwise, they’d contain mostly iron from the star’s central regions.