Asteroid scientist Amy Mainzer found herself in a unique position these past few months: chatting with Leonardo DiCaprio about science and asteroids. Mainzer served as the science advisor for Netflix’s new film “Don’t Look Up,” a comedy-disaster film that is set to release in theaters on Dec. 10 (and on Dec. 24 on Netflix). This movie follows a long legacy of films that feature space rocks threatening Earth, like 2020’s “Greenland,” 2012’s “Seeking a Friend for the End of the World” and the famous 1998 duo: “Deep Impact” and “Armageddon.” An official trailer for “Don’t Look Up” from September showed DiCaprio (who plays astronomer Randall Mindy) and Jennifer Lawrence (who…