This artist concept shows that NASA Spitzer Space Telescope found evidence that this star, the remains of which are named Cassiopeia A, exploded with some degree of order, preserving chunks of its onion-like layers as it blasted apart.
This artist concept shows that NASA Spitzer Space Telescope found evidence that this star, the remains of which are named Cassiopeia A, exploded with some degree of order, preserving chunks of its onion-like layers as it blasted apart.