Science and the search for objectivity are important aspects to take into account when trying to make sense of morality. Many consequentialist systems (such as utilitarianism) depend on analyzing the action and its effects. Although, contemplation within moral frameworks is strengthened and magnified by scientific discoveries: strengthened by taking the implications of empirical data and using them to infer new ways of moral behaviors; magnified by looking at moral issues through the lens of theoretical objectivity with more precision than if one chose to ignore them.
I say that science is a necessary tool. I do not mean that it is a sufficient one. All that is gained from utilizing scientific knowledge in morality is by all means pragmatic. The question regarding absolute truth does not need to be taken into account because science (and morality) are seemingly human inventions. They both exist for our own benefit; this is why we have them.
It is foolish to claim that science is the only tool that can lead us to a coherent and adequate moral system. Logic, for example, is another important thing to consider. Some philosophers say that even emotions could serve a role for this mission. But this is talk for another time.