They were forced to continue in secret after the blight, tasked by the government to find a stable planet that could support human life. Professor Brand, who was the brains behind the operation, was working on a gravity equation to make this mission possible.
When the peaceful science focused National Aeronautics and Space Administration (NASA) refused to design, construct, and launch this concept, the U.S. Government shut them down as punishment and to save funding for the war effort.
They discover the "ghost" is an unknown intelligence sending coded messages using gravitational waves, leaving binary coordinates in the dust that direct them to a secret NASA installation led by Professor John Brand (Michael Caine).
Interstellar is a movie surrounding an idea about the future Earth which will become uninhabitable due to a widespread crop blight and a second Dust Bowl. NASA scientist Professor Brand is developing strategies to preserve humanity by transferring Earth's inhabitants via a wormhole to a new planet.
Towards the third act of the film, Cooper comes to the speculative conclusion that the wormhole was placed there by future humans in order to ensure the survival of their species, and giving them access to the quantum-data required to complete Professor Brands equation of gravity, further granting them the ability to ...
Neil deGrasse Tyson Explains The End Of 'Interstellar'
Who are the 5th dimensional beings in Interstellar?
The fifth-dimensional beings are not aliens; the fifth-dimensional beings are humans from the far, far, far future, who have evolved beyond the limits of the third dimension. These far future humans are now helping to create themselves by giving humanity the wormhole to a new galaxy.
Due to Gargantua's massive gravitational pull, “every hour on that planet is seven years on Earth”. After a massive tidal wave hits the spacecraft and delays their exit, they find that 23 years have passed on Earth.
It's only when she returns to the room as an adult however that she realises the ghost is actually her father - the big clue being when Cooper wrote "STAY" in morse by knocking books off the wall while his past self was leaving for the mission, which Murph wrote down as a child and rediscovers as an adult.
We are shown that middle-aged Murph comes back to her room and tries to re-enact the part when she had locked herself up and got the message "STAY" from the ghost. She opens her notebook and right after that, she realises that the ghost was her father.
It took the spaceship 18 months to travel to the wormhole, then 23 years passed from exploring planet Miller. Murph said (cried) in the video to his dad that she is finally the same age as him when he left. Which tells us that she and her dad are both 35 years old toward the end of the movie.
I think if he'd somehow made himself stay (through binary, etc), he would have altered the future and he would have disappeared into the blackhole forever, but the fact that he gave the co-ordinates of the NASA base and sent himself to space, he stayed in existence even though he does alter the...
Why is there no Spaghettification in Interstellar?
The answer lies in the mass of the black hole. The destructive tidal forces that tear objects apart or cause spaghettification depend on the size of the black hole. Gargantua, being a supermassive black hole with a planned mass of 100 million solar masses, allows Cooper to enter without being torn apart.
Interstellar's depiction of black holes and their surrounding features closely resemble real photographs procured by the Event Horizon Telescope years later, although its color tone differs slightly from reality for aesthetic reasons.
For the moment, sending humans to the edge of interstellar space, let alone across the cosmic void to other stars, remains firmly in the realm of science fiction. But scientists and engineers are developing skills and technologies that might help us get there one day.
On his deathbed, Professor Brand finally admitted to Murph that Plan A was a ruse. This prompted Murph to send a message to her father, accusing him of being aware of the lie and abandoning her to die on Earth. This proved to be a revelation to the entire Endurance crew, but not to Dr. Mann.
Seems fair enough, right? Ok, now follow a few steps. Murph was 10 years old when Cooper left. Cooper traveled for 2 years to the wormhole and subsequently lost 23 years in gravitational time dilation on Miller's planet.
It is then revealed that he and Professor Brand knew that Plan A was impossible and that the only contingency that allowed for human continuity was Plan B. Mann did not want Cooper to return to Earth with the Endurance, as he now needed it to reach Edmunds' planet with the remaining crew to start a colony.
On his deathbed, Professor Brand confesses to Murph that he lied about his Plan A's prospects – that he failed to “reconcile relativity to quantum mechanics” and his gravity project needs much more data. She takes on the project herself and beams out the bad news to space, where Coop and Amelia receive it.
Mann needed the Endurance to survive and complete Plan-B with the surviving crew. Meanwhile, Romilly successfully accessed KIPP's archives, which revealed the true data of Dr. Mann's planet. Before Romilly could inform the others, the robot detonates, killing him in an explosion.
Brand : Why didn't you sleep? Romilly : Oh, I had a couple of stretches. I stopped believing you were coming back. Something seemed wrong about dreaming my life away.
The statement that one hour in space is equivalent to 7 years on Earth is not accurate. Time dilation, a concept from Einstein's theory of relativity, does affect time in space relative to different reference frames, but the effect is typically negligible for most space travel scenarios within our solar system.
