Well, eso, now there's a point. We, the unwashed masses, have to, in our minds, believe that the scientists know what they are talking about. We question things like black holes and black matter, because they seem so extremely bizarre, but we have agreed to believe other claims by scientists, even though there's no way we can personally prove it true or untrue. Much of what we personally know, is because we have made the decision, 'yes, I will believe that, whatever that is, is true.' Takes 8 minutes for sunlight to get to earth? Well, ok, if you say so.