Final answer:
The title 'Kepler-34b: A New Gas Giant in a Binary Star System' is most appropriate because it directly references the discovery of an exoplanet orbiting double stars, which is the key point of the information provided.
Step-by-step explanation:
Based on the information provided, the most appropriate title for the article would be (B) Kepler-34b: A New Gas Giant in a Binary Star System. This title succinctly captures the essence of the article's content — the discovery of Kepler-34b and its unique characteristic of orbiting within a binary star system, akin to the fictional planet Tatooine from Star Wars. The article emphasizes the novel findings made by the Kepler space telescope, which include discoveries of exoplanets, multi-planet systems, and the ability of planets to exist around double stars. Additionally, the article mentions citizen science and the technological developments sponsored by Yuri Milner in relation to exoplanet research.