The premise behind Christopher Nolan's "Interstellar" has been kept under pretty tight wraps. What we do get from this newest trailer, however, is a bit more background thanks to even more footage from the film. READ MORE: Watch: First Full Trailer for Christopher Nolan's 'Interstellar' Starring Matthew McConoughey "We used to look up at the sky and wonder at our place in the stars," McConaughey's character says.