So far as your course at the Temple University is concerned, that is the best platform for introducing our philosophy to the serious persons. And if they become sincere to learn the highest topics of subject matter or transcendental knowledge from us, that will be the perfection of their education. If you must read some other books of philosophers, even they are Mayavadis, as a sideline we can speak about them as comparative study. Otherwise our main aim is to study and preach Bhagavad-Gita and Lord Caitanya. Our purpose is to teach our own philosophy. Do not lose sight of that purpose or become distracted by other things. I have also made one book about other philosophies of your western philosophers, but I did not make compromise. My purpose was to defeat them and expose their nonsense propositions, in the light of Vedic knowledge or Krsna consciousness philosophy. That is our purpose.
Regarding your other questions, Lord Jagannatha does not have His own planet. The whole spiritual world is a manifestation of the spiritual energy of Krsna, so Subhadra or Radharani, they are spiritual energy of Krsna, but there are varieties of different forms of that energy, that's all.