If you haven’t seen Gravity yet, you ought to. It’s a terrific, white knuckle, gorgeous, terrifying ride through space. Just don’t tell that to Neil deGrasse Tyson, the famed astrophysicist who’s become a bit of a science celebrity and who is also very hard to please when it comes to film. Although the movie has received a lot of praise for its scientific accuracy, it’s not quite enough for deGrasse Tyson’s liking, who went on a small Twitter rant about the film’s inconsistencies. Some seem a little nitpicky. Some are actually sort of poignant. None actually make Gravity anything less than an excellent movie …