Please_don't_ban_me wrote...
Not Carl Sagan, I can't really respect it. Neil Degrasse Tyson is pretty great, but taking the name? No. Just no.
Not sure if you are trolling there or not... totally serious here.
They both knew each other from way back. Neil, just starting out his journey into the sciences [well mainly physics, then branching off], interacted with Carl when he was applying for a university. Carl was trying to get Neil to attend Cornell but ultimately Neil went to Harvard.