SOLAR SYSTEM

Detailed explanation-1: -It’s orbiting Gargantua, the massive glowing black hole that exists in the foreign galaxy. Due to Gargantua’s massive gravitational pull, “every hour on that planet is seven years on Earth”.

Detailed explanation-2: -Romilly) has aged 23 years during the time they spent on the planet’s surface. This is due to the extreme time dilation caused by being within the gravitational pull of the black hole. Also, Cooper watches video messages from home, and finds out his daughter is now the same age he was when he left earth.

Detailed explanation-3: -The speeds required for interstellar travel in a human lifetime far exceed what current methods of space travel can provide. Even with a hypothetically perfectly efficient propulsion system, the kinetic energy corresponding to those speeds is enormous by today’s standards of energy development.

Detailed explanation-4: -There was a small detail from the movie Interstellar. When Copper was trying to hack the Indian Drone you can see indian languages on his screen like Hindi and Bengali. So yes India as a country is referred in this movie.