If Joan is going on an interstellar voyage with her family, will she come back with pictures of her and her family posing by monuments and landmarks found on Earth? How do you know?
No, Joan would not come back with pictures of her and her family posing by monuments and landmarks found on Earth because an interstellar voyage implies that they are traveling to distant star systems beyond our solar system, where Earth's monuments and landmarks would not be present. This can be inferred based on the definition of interstellar travel, which involves journeying between stars in outer space.
