Sushant Singh Rajput is all set to begin his training at National Aeronautics and Space Administration (NASA) by the month end to prepare for his upcoming movie 'Chanda Mama Door Ke'. Directed by Sanjay Puran Singh Chauhan, the movie is all about a team of astronauts whose mission brings the country together. The actor will practice the moonwalk and experience zero gravity, fly a space shuttle simulator and learn other simulations programmes at NASA from July 21 to 24. The movie will start rolling by the end of September or early October.