Add to this, the set and the visual effects that were meticulously created for the film. The spacecraft and the costumes look like they were made by space agencies themselves; and the view of the constantly-rotating Earth brings you a realistic perspective of our home planet as seen from orbit. The film's designers and artists have convincingly made it appear that they did film in space.
Cuaron and his team also relied on science to help accurately portray what really happens in space, from the near-silence of space to how objects, from tears to makeshift jetpacks, move in a microgravity environment. There are, however, several errors, such as the Hubble telescope and the International Space Station being just a hundred miles from each other (in reality, they are in vastly different orbits, as experts have noted). The film's science adviser Kevin Grazier explained, it was an artistic decision to keep the "errors" that way. This is a movie, not a science documentary, so it's understandable.
Add to the amazing visuals are the outstanding performances of both Bullock and Clooney as the marooned protagonists. Bullock's acting, in particular, is what many critics have been noting as Oscar-worthy, and it is. She makes you feel her character's internal and physical struggle as she tries to stay alive. You can feel her frustration, her fear, and at points, relief, dodging one mishap after another. Sometimes the dialogue feels out of place or weird (seriously, is "I hate space" what someone would say when everything's disintegrating?), but what the dialogue lacks, the two actors more than make up for their portrayal.
Mix all these together, and you have a riveting, heart-pounding, edge-of-your-seat movie experience. At first, the free-flowing camera movements will make you a bit dizzy, but once you get your bearings, you will feel as if you are also traveling with the two astronauts, seeking safety from one satellite to another. The cameras go back and forth between the grand and the minute, all expertly weaved into a 90-minute-long film. Explosions and collisions occur in dramatic near-silence, punctuated only by the dialogue, the astronauts' breathing, and the well-timed musical scoring. All these, as our home planet silently revolves hundreds of kilometers below, while the stars – also accurately portrayed, a testament to meticulous planning – punctuate the cold, dark, and vast loneliness of the cosmos.
"Don't let go." Stone says this in one pivotal scene, as she pleads to a Kowalski dangerously drifting away from safety. This might well be the advice when watching "Gravity": don't look away from the screen even for a second and take in all that this visual, visceral treat has to offer. The film is not just something you need to watch, but also something you need to experience. - Rappler.com