For anyone who has seen the movie “Interstellar”, and enjoyed it, I highly recommending also watching the documentary “The Science of Interstellar by the Discovery Channel.
It is narrated by the main star of the movie Matthew McConaughey, and shows how the movie is based on actual science. They have a consultant astrophysicist Kip Thorne who assisted with the production of the movie.
But the real star of the documentary was Marsha Irvins, an astronaut who had flown into space a total of five times aboard the space shuttle. She appears towards the end of the documentary, and her quote touched me the most. She said
I looked up overhead and there was this black sky and this blue earth, all hit you at that point, I am not on the planet anymore.
And every astronaut who has flown has come back and said the same thing, as you circle the earth, you do not see natural borders and boundaries that separate countries, and all of the wars and the angst and the strife that tear this planet apart, seem so insignificant from that view.