These filaments, observed for centuries, continue to puzzle ... in Cassiopeia A. Using infrared technology, the telescope captured a light echo caused by a massive star’s explosion, unveiling ...

The NIRCam image displayed the inner shell of Cas A in hues, representing gas knots rich in elements like sulfur, oxygen, argon, and neon Contributions to new stars and planetary systems Debris ...

Astronomers studying the aftermath of a supernova explosion ... the "undead" star. In the year 1181 (the supernova's namesake ...