Yup...his iPhone.
http://www.reddit.com/r/IAmA/comments/ngd5e/i_am_neil_degrasse_tyson_ama/c38v8m0
http://en.wikipedia.org/wiki/Neil_deGrasse_Tyson
http://www.reddit.com/r/IAmA/comments/ngd5e/i_am_neil_degrasse_tyson_ama/c38v8m0
Question: If a space traveling entity approached you with an opportunity to visit any celestial object from any distance and allow you bring one scientific instrument of your choosing, where would you go and what would you bring?
Answer: I'd bring my iPhone, as the most compact representation of modern culture there is. And I'd visit a civilization on a galaxy 65 million light years away. Assuming I can get there instantaneously, I would look back to Earth with their presumably super telescopes and witness the extinction of the dinosaurs - the light of which is just now reach them.
http://en.wikipedia.org/wiki/Neil_deGrasse_Tyson