News is still developing on this story, but it looks like James Horner, longtime Hollywood composer, has died in a small-plane crash of his private single-engine S312 Tucano northwest of Los Angeles. The pilot's remains have not yet officially been identified; no one else was onboard. (Horner, 61, has not been reachable by friends or family.) Responsible for some of the signature movie music of recent decades, Horner was the composer of Aliens, Braveheart, Apollo 13 and Titanic, the latter of which won him two Oscars and remains the biggest-selling orchestral soundtrack of all time. Capable of grandeur and subtlety alike, Horner did especially well by science fiction: His score for Star Trek II: The Wrath of Khan is a legendary piece of wonderment. Here's a sample of it below. Rest in peace, James.