Question: Why type of propulsion system does the Endurance use? It took 2 years for them to reach Saturn from Earth. Once they're in the other galaxy, the ship appears to travel between planets in mere hours/days. Also, it appears that the smaller shuttle craft was launched from Earth on a Saturn V type rocket, but later when leaving the surface of other planets, they have no such system.

Chosen answer: I am not exactly sure what kind of propulsion system is used, however; you must consider that although in our galaxy even the closest planets to Earth take years to travel to, in this alternate universe, the planets may be arranged in a closer formation.

Question: Why do they still have gravity when Romilly asks Cooper to turn of the spinning, when they neared the wormhole? The centrifugal force stops, but on the inside there is still gravity.


Chosen answer: They do not still have gravity. Romilly is actually floating, but nothing is ever shown from behind his back, so the floating is gone unnoticed. In fact, during some shots of Romilly, you can see his feet floating behind him.

Casual Person

Question: Why is the film titled "Interstellar" when the plot revolves around intergalactic travel?

Charles Austin Miller

Chosen answer: Interstellar means travelling among the stars, no matter which galaxy you're in, which is what was going on. While intergalactic does mean travelling between galaxies, it's more indicative of being in the empty void of space between galaxies, not going from one galaxy to another. And since they travelled by wormhole, they were never really in the empty space.


Question: What happened to Wolf Edmund? He was one of the dozen astronaut explorers that went into the wormhole to search for suitable planets. Anne Hathaway was in love with him. Did he die before she and Cooper reached Planet Edmund or was he still alive when Brand landed there?


Chosen answer: Per the novelization of the movie he was dead when they arrived. CASE and Brand gave him a burial.

Carol Lalonde

Question: Why did he ask Murphy through binary to ask him to stay in the past? What good would he do if he stayed on earth? Murphy wouldn't be able to crack the solution of the fifth dimension if it wasn't for future Cooper's Morse code on the watch.

Chosen answer: As an emotional being, Cooper reacts to getting away from his daughter, which at the point he believes is for the last time. In that moment, Cooper is of the view that Plan A could never have worked. That coupled with the fact that his only motive to get on the Endurance mission was to somehow bring Plan A to fruition, is the reason he is emotionally compelled to ask her daughter to ask him to stay. Rational reason works but an emotionally charged moment trumps it all the time.

Question: How exactly is the artificial gravity created on the Endurance? If it is due to the centripetal force created by the rotation, then isn't the gravitational force supposed to make them stand normal to the edge of the circle, considering the outward direction of the centripetal force?

Chosen answer: Firstly, it's not centripetal that's pointed outwards, it's centrifugal. Secondly, what you say is precisely what happens aboard the endurance. The crew having docked ranger, moves to the ring module (the outer circle). Cooper initiates the rotation of the ring module and as such the centrifugal force pushes them outward onto the relative floor of their module. Most of the scenes that we witness are crew based in the ring module, and not aboard any of ranger or lander.

Question: When the crew gets struck by the gigantic wave on the Miller's planet, CASE is shown to be able to morph into a wheel-like form, and rescue Amelia. If CASE is actually that fast, and that "versatile" to hold things while running, why can't he actually just move around the surface, and survey the wreckage of Miller's ship. That would have saved a lot of time, wouldn't it?

Chosen answer: The robots are very helpful in this movie, yes, but the movie also makes a point that exploration is done by humans and not by the robotic helpers. Compare this to the docking scene, where the robots initially thought that the maneuver was impossible. Relying on the robots might actually hamper the exploration.


Question: SPOILER ALERT: What exactly happens in the end, does Cooper actually die and the Tesseract and the Cooper station were just parts of his dream? Please let me know if I might have missed something because the explanation that he travels back through the wormhole to Saturn does not make sense to me. He must have been sucked inside the Gargantua and died, surely?

Chosen answer: What actually happens in a black hole is not fully understood and mostly theorized by science at this time, so in the context of the movie Cooper could have survived.