I always thought Ron was snubbed on this one for the Oscars when Braveheart won best director (a film I liked, but no where near the achievement in directing to capture on film). The weightless scenes alone - a first - to have the cast actually weightless - no wires or visual effects - are incredible. For those who didn't know, Ron enlisted NASA's "vomit comet" to fly his Apollo 13 capsule set and lunar module set. The plane is used for weightless training of astronauts, and they flew 612 flight parabolas, for a total of nearly four hours of weightless footage. Each weightless segment only lasts 25 seconds.
So if you like history, excellent story telling and acting, and wire-free weightless scenes - check it out.