Clearly, there are many comparisons one can make between ID science and the search for extra-terrestrials. That both are examples of design detection is obviously the first that comes to mind. Both, however, are also detecting design without knowing the identity of the designer. This is supremely important.
One of the claims of Darwinists is that ID is not science, because one can not detect design while knowing nothing of the designer. Yet, those same Darwinists will tell you that SETI is science. How can this be? Do we really know the identity of the designer that sends us signals from the distant reaches of space? Yet, we still think we can detect those signals, and we still call it science. These intelligent designers of signals that reach Earth could be totally different forms of life, with different means of thinking, communicating, reacting, feeling, etc. We really don’t know anything about what might be out there in terms of lifeforms, so we clearly can’t identify the designer, or even know anything about the designer. Sounds a lot like ID science, doesn’t it? The only difference is that the materialists have an a priori bias based on their worldview that they feel is threatened by ID science, but not by SETI. Therefore, they must oppose ID, hence they claim it is not science. This is just more evidence of the weak position of the materialists and their knee-jerk reactions to defending their worldview in emotional ways.