Supernova Cassiopeia A is located in our galaxy about 11,000 light-years away from Earth and is one of the youngest known supernova remnants at about 350 years old. Scientists have found fragments of titanium blasting out of this star explosion. This discovery could be a major step in identifying how some giant stars explode. 🌟 Credit: NASA/CXC/RIKEN/T. Sato et al.; NuSTAR: NASA/NuSTAR | Canadian Space Agency