You may have grown up learning that there are nine planets in our solar system – but the children of tomorrow might learn that there are ten. Tu You may have grown up learning that there are nine planets in our solar system – but the children of tomorrow might learn that there are ten. Tuesday night on Full Focus, we'll learn about the scientific debate about this so-called "tenth planet." Also, host Gloria Penner talks with UCSD Chancellor Marye Ann Fox about the university's plaudits and problems -- from its recent ranking as the hottest institution for studying science, to a recent exodus of black faculty members. Guests: Scott Kardel, Palomar Observatory; Marye Anne Fox, UCSD Chancellor more >> <<less