Congratulations! You have reinstated the Apollo program and have launched humanity into the stars. After traveling through space, you come upon a distant star system that is home to an alien civilization. They seem very friendly and willing to show you around, but you are utterly incapable of communicating with them. They have presented you with six cultural artifacts, which you must inspect and understand from two different perspectives in order to answer the key question: what is preventing you from communicating with the aliens?
Note: All puzzles in this round have two answers.