  Establishing the origin of short-lived radionuclides (SLRs) with half-lives
$\leq$ 100 Myr has important implications for the astrophysical context of our
Sun's birth place. We review here the different origins proposed for the
variety of SLRs present in the solar accretion disk 4.57 Ga ago. Special
emphasis is given to an enhanced Galactic background origin for $^{60}$Fe which
was inherited from several supernovae belonging to previous episodes of star
formation, rather than from a nearby, contemporaneous supernova.
