Using the space as a metaphor to show how badly we hunger for the unknown. The span where the protagonist would travel just to find the answer to the questions in his hollow heart since the day his dad's left is a journey worth exploring. The movie may be too slow for many. However, it's like meditation - one will experience the stillness in finding out the answer by going through a series of realisation. Max Richter's composing has given the movie even greater depth. I love how the settings, colour and pictures deepen the feeling of loneliness and other emotions.