HBOIf us plebeians don’t always get the time to stay abreast of the latest TV, how do you think Neil deGrasse Tyson does it? The astrophysicist finally caught up with “Game of Thrones” over the weekend (or he was waiting for everyone else to do it), and the Lord of Light has blessed us with some fascinating observations about the show’s scientific accuracy. Tyson unleashed a string of tweets elucidating the show’s realism, including an assessment of dragon wingspans, the temperature of their fiery breath, and the best way to pull a zombie dragon out of a freezing lake. “Everybody all caught up on ‘Game Of Thrones’?