New observations of the famous Tycho’s supernova remnant by the Suzaku X-ray astronomy satellite have revealed that a reverse shock wave racing inward at 1,000 times the speed of sound is heating the remnant and causing it to emit X-ray light. This composite image shows the Tycho supernova remnant. Image credit: X-ray – NASA / CXC / Rutgers / K. Eriksen et al.; optical: DSS. The Tycho’s supernova, also known as SN 1572 or Tycho’s...
