"There is no evidence for a distant shell of cometary material surrounding the solar system , and there is no known way to add comets to the solar system at rates that even remotely balance their destruction ."
"Actually , there is . Well over 200 trans-Neptunian objects have been directly imaged by various means . All but Pluto have been found since 1992 , and way over half have been found since 1998 . I notice that of your references , one was published early in the year that the first ( third if you count Pluto and Charon ) was discovered , another was published two years later , and the third was published in 1974 ( ! ) . MY GOD ! ! 1974 ! I also notice that none of them have anything to do with comet origin ."
"surrounding the solar system ,"
"trans-Neptunian objects have been directly imaged by various"