Supernova remnants as discovered by Johannes Kepler in 1604X-ray: NASA/CXC/NCSU/M.Burkey et al; Optical: DSSBy Joshua SokolThe facts of the case are as follows. On the night of 9 October 1604, Europe turned to the south-western sky, where Jupiter, Saturn and Mars were slated to assemble in Sagittarius. Some believed it would herald a radical transformation...