Credit: Hubble
26Al and 60Fe, and other such Short-Lived Radioisotopes (SLRs) have a significant impact on the formation and evolution of planets. In particular, decay heating from these SLRs provide the bulk of energy for heating and desiccation of volatile-rich planetesimals in the early solar system. The source of these SLRs is contested, however.
The solar system has a significantly higher fraction of both 26Al and 60Fe than the interstellar medium.