Interstellar makes you think. True to form for its director, Christopher Nolan, the intergalactic sci-fi epic challenges our notions of space, time, and the limits of human ingenuity. Employing the grandiosity of a string orchestra one minute and the eerie minimalism of a solo piano the next, Hans Zimmer's score conveys wonder, excitement, and tension all at once. The plaintive melody that appears in "Cornfield Chase" and "S.T.A.Y." captures the love story at the film's center, while the enormity of "Mountains" and the vertiginous chimes in "Coward" express the chaos that surrounds it.