You may not know him, but you may remember that Pluto was once one of the planets in our solar system. Well, it is no longer the case nowadays, and Prof. Tyson is the man who takes the responsibility for the "demotion" of Pluto. He was a guest actor in the The Big Bang Theory's The Apology Insufficiency episode. He will now be visiting the Faculty of Science, National University of Singapore on 14 February, for an event held in LT 27, 12 noon. Valentine can't be any better now!
Due to limited space, however, the event is only opened to NUS staff and students. I sincerely apologize for my earlier post (in this same website) which stated that the talk is "public".
If you have a burning questions for the two speakers, you may want to submit them with hashtag #COSMOSSG on Twitter, Facebook and Instagram.