He chews on that (literally) for a bit, waiting until he's mostly done before saying anything else.

"But you said you've been only on this planet for a while, right? The Clone War's only be going on for a few years. You've already said you aren't connected to..." he waves a hand vaguely, "anything out here. You so sure you would've gotten the news?" It seems marginally more plausible than that he's in an entirely different universe galaxy.

"Guess the star charts can't hurt," he adds, "we can compare them to the ones Artoo is carrying."