Christopher Nolan is film director that created some of the most succesfull 21st century movies. 7 of his movies is in international movie rating internet page www.imdb.com top 20. This shows that he's one of the greatest film directors of this century.
Here is some of his best movies. I highly recommend to watch them, for those who havent seen them yet.
The movie "Interstellar"(2014), starring Matthew McConaughey and Anne Hathaway is about a group of explorers who uses a sphere called "wormhole" to travel to the other side of the Universe to find a new world, where mankind could live, because in the nearly future Earth isn't suitable to live anymore. In my opinion, this is the best movie about space travels.