Speaking with the UK magazine Culture (via Contactmusic.com), Cameron revealed the one slight fix he made to the 1997 blockbuster: the night sky.We last went back to Titanic for the tenth anniversary of its release, but feel free to complain again about L.A. Confidential not winning Best Picture. (You're still right.)
Cameron was urged to make the fix by Neil deGrasse Tyson, an astronomer who questioned the position of the stars during "Titanic's" climatic scene.
"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,'" Cameron said. "So that's the one shot that has been changed."
added: Video of NdGT explaining his problem with the movie (Revised link). Awesome.