Neil deGrasse Tyson -- The Force Is Not With Me ... I Ride With Trekkies

Nerd demigod and astrophysicist Neil deGrasse Tyson doesn't mess around when it comes to science or sci-fi ... which is why there's one clear winner for him in the 'Stars Wars' vs. 'Star Trek' debate.

Tyson was leaving 30 Rock when we asked him if he was excited about the recently released "Star Wars: The Force Awakens" trailer.

He admits he's never been a big supporter of the Jedi due to scientific inaccuracies -- but says there is ONE thing correct about George Lucas' universe. Just one.

Let the nerd battle begin!