This is further confirmed by another exo-study--this one involving exo-comets. After planets like the ones in Kepler-32 system (and in our solar system) are done forming, there are still some leftovers, planetisimals and comets. Barry Welsh, a research astronomer at the University of California, Berkeley's Space Sciences Laboratory, set out to find these remnants, and located six new exocomet systems. These comets orbit A-type stars, which are very young (around 5 million years old). But again, statistical evidence suggests the older stars should have comets, too. Exocomets may be as common as exoplanets.