Solar System is Traveling through Cloud of Supernova Debris

 An international team of scientists has found interstellar iron-60, a radioactive isotope with a half-life of 2.6 million years that is predominantly produced in massive stars and ejected in supernova explosions, in deep-sea sediments dating from 33,000 years ago to the present.

Possible Local Interstellar Cloud is the remains of a supernova.