I'd imagine morality is subjective to whichever culture any alien civilization may have. Rather, I'm sure it would be, much in the same way that morality differs here on Earth depending on culture and upbringing. That being said, moral responsibility I consider to be an internal force based on the need to fit in with a group. Would it be possible for us humans to take the strides necessary to achieve social and cultural unity prior to the time of meeting any possible new sentient species in the universe? I won't speculate that. Towards the original topic at hand however, I've always felt at this point in time while we live in a technological society in which knowledge is abundant, our sphere of influence within the universe has not expanded to match. I've found myself with insatiable bouts of wanderlust, feeling the only thing which would satisfy the curiosity would be to set foot on Mars.