When Clooney's character falls into the water while making the trek to another communications/satellite station, he would likely have succumbed to after just minutes.
Members of the science station are shown being evacuated in full daylight, but the screenshot gives the date as February. The arctic would be in full darkness in February.
When entering the asteroid zone, the Aether ship is literally bombarded with rocks.
The actual density of asteroids is much lower than depicted in the movie and the impacts would be very rare.
The fictitious moon around Jupiter would be utterly uninhabitable by humans because of Jupiter's immense radiation.
When Sully is on monitor to hear her baby's heartbeat, the fetal heartbeat rate is rather low. It should be 1.5 - 2 times faster than an adult's heartbeat rate.
When Sully and Adewole are playing cards, Sully uses the term "math." While both are British, they have also spent much, if not all, of their careers with NASA, and thus the Americanism is not unlikely.
At 56:30, Augustine flees the trailer, seeming to grab only his red bag and leaving his orange coat behind. After being submerged in the water in his black shirt, he is later "warming up" wearing the orange coat. It is difficult to see, but when he picks up Iris, he also grabs the coat with his hand, underneath her.
It is impossible to move through the centrifuge straight tunnel to the centre of the starship without touching the tunnel wall. The Coriolis force will press the moving objects to the wall.
Clooney had to make a trek to another comms/satellite station that was more powerful than the one he was at. However, it was also situated in a valley. The Line of Sight from being in a valley would greatly reduce the ability to communicate, especially with a moving spacecraft. If anything the comms/satellite station would have been positioned higher on a mountain.
The entire impression given at the end that the two of them were the last survivors of Earth and of human race is utterly sham. When they had gone to K-23 moon of Jupiter, and it was no fly-by that they return to Earth, they had actually landed there and stayed there, so It was wrong to tell that their mandate was to return from K-23 to Earth. Most of the astronauts would have stayed on K-23 with enough food and necessities and equipment, and only some would have been asked to return (for whatever reason) to Earth. So their must be many other people, males-females, must already be there on K-23 who were meant to stay there and procreate. There is no reason why NASA would have wanted everybody to return to Earth. Thus, the impression of the two being last and only survivors is misplaced.
Augustine attempt to contact Aether on the radio & when he doesn't get a response immediately, tries to contact them again.
Radio waves takes 45 minutes to travel to Jupiter, so there would not be a response to Augustine for at least 90 minutes.