It would appear that the NASA in this movie really sucks if they can't find a planet in our solar system. What if there was another Earth in our solar system? That's the question Another Earth addresses in a convoluted fashion. More specifically, the question Another Earth addresses is "What if there was another earth in our solar system and an angsty girl shot in soft light wrote a poem about it, then maybe killed Ethan from "Lost" in a car accident, then played Nintendo Wii with him on the other Earth?" What would you do then, huh? If you answered, "Be a little confused and frustrated that such a great concept is made to look so boring," then you are correct. This film appears as though it doesn't really depend on the whole "there are two Earths" notion, which seems like a waste of a good premise. It's possible the cool parts are hiding, but none came screaming out of Another Earth, the bastard lovechild of Contact and Girl, Interrupted.