In an interview with UK magazine Culture, Cameron explained why he decided one scene could use revision.
Oh, there is one shot that I fixed. It's because Neil deGrasse Tyson, who is one of the U.S.' leading astronomers, sent me quite a snarky email saying that, at that time of year, in that position in the Atlantic in 1912, when Rose is lying on the piece of driftwood and staring up at the stars, that is not the star field she would have seen, and with my reputation as a perfectionist, I should have known that and I should have put the right star field in.
So I said, 'All right, you son of a bitch, send me the right stars for the exact time, 4:20 a.m. on April 15, 1912, and I'll put it in the movie.' So that's the one shot that has been changed.
Even the most diehard Titanic fans are unlikely to notice a difference. (Astronomers everywhere are surely cheering, however.) Personally, I was hoping Cameron would make some more dramatic alterations — like using the godawful alternate ending.
[Image via AP]