They’re all here: ET pointing the way home; Dorothy’s iconic ruby slippers; Charles Foster Kane’s childhood sled, Rosebud; R2D2; the ravenous shark from “Jaws”—and so much more. It took 92 years to get this long-wished-for project completed. But on Sept. 20 the $484 million Academy Museum of Motion Pictures opened its doors to the public, combining a wonderland’s worth of memorabilia, the history of the movies, and a celebration of the craft of filmmaking. The museum occupies the landmark 1939 art deco building at the corner of Fairfax Avenue and Wilshire Boulevard that was formerly the May Company department store. The classic exterior remains, but the building’s seven interior floors have been totally redesigned, reconfigured, and repurposed by architect Renzo Piano. Certain to become an instant tourist attraction, the Academy Museum is situated just west of the Los Angeles County Museum of Art and the Museum of Natural History at …