allenmaher said:
Gravity was not terrible, they got a lot of things right, but they had some very serious math problems. For a movie based on orbital mechanics, I don't think they pulled out a calculator once. A cascading debris failure is possible, but here is the thing most non polar orbit satelites orbit in the same direction, meaning the periodicity of the debris field was all wrong. American space suits fitting through russian doors, poppy cock. A 13 degree orbital change not at an acending or decending node using only soft landing boosters, pure fantasy (a few hundred m/s delta v will get you no where near that). And what pray tell caused the chinese station to fall from orbit so quickly.... unless they scuttled the thing (no evidence of that) it is also fantasy. It takes an hour to get out of a space suit by yourself. The orbital alignments were impossible. Jetpacks don't have that much fuel. Clooney letting go after they stopped stupid... just plain stupid what pray tell was then pulling on him in micro gravity after the interial force had been overcome? Jesus? or jus deus ex machina? I enjoyed 12 years a slave more, it is at least based on real people and events. The events depicted in gravity could never happen, ever! It was pretty cinamatography. |
I agree with all that. However the scene with Clooney letting go is actually plausible if you see it through from the beginning. They veer of in different directions when they get separated. She gets caught in the netting and her forward momentum is transferred to a circular path on the rope, which allows her to intercept Clooney. The law of motion dictates that she should transfer some of that circular momentum after grabbing on to Clooney, who should come along with her on a circular path. So it's the centripetal force that's still at work.
But then all goes wrong. They film it in such a way that it appears they're not moving at all, her circular orbit seems to be gone right as she grabs onto Clooney's safety line. And after he let's go, she should still continue on her circular path, not bounce straight back to the ISS. Badly fudged up scene. But it becomes clear what probably happened after you watch the extras. Somebody probably calculated it all through to make it plausible and then got pushed aside in favor of the best shot. It happened with a lot of things in the movie. I guess that's what best directing is for...
Anyway for a movie trying to be realistic there's just so much wrong with it. Clooney's jetpack exhaust would have damaged the solar panels with all that messing around at the start. The fire extinguishers used in space are far smaller, not all that useful for travel. Fire doesn't spread that fast on the ISS. Why is there so much stuff floating around inside ISS, and who brings braces to space? Soyuz is a lot smaller inside, certainly no room to maneuver to put a space suit on. They have the excercise equipment tied to the wall in the ISS instead of bolted, because the vibrations from the astronauts will damage the solar panels, yet the Soyuz jerking on the station and firing rockets at it has no effect. Nevermind you can't deploy the parachute while it's docked, the 4 parachutes are inside the Soyuz.
This is what it really looks like https://www.youtube.com/watch?v=doN4t5NKW-k Check out that hair in space!