Final answer:
The characters in the passage are likely seeking adventure and discovery, which relates to the broader themes of curiosity about the universe and the pursuit of scientific knowledge.
Step-by-step explanation:
The question appears to be prompting an analysis of a passage related to themes of exploration and curiosity. Given the references to science and medicine, the galaxy, reading, questioning, and looking beyond their current surroundings, the characters in the passage seem to be seeking Adventure and discovery.
This theme aligns with concepts found within the provided text, which emphasizes the thrill of unraveling the mysteries of the universe, the pursuit of astronomical puzzles by scientists like Andrea Ghez, and the inspiration derived from science fiction and space exploration.