Sure, but I guess my point is that we had only indirect data about the fringe of our solar system before, and now that we have more direct data (i.e. actually s

Sure, but I guess my point is that we had only indirect data about the fringe of our solar system before, and now that we have more direct data (i.e. actually sending a satellite out there) we discover something pretty big. The data we have about further away galaxies is even more indirect and the light we get from them is subject to any number of possible phenomena we may not have accounted for. The level of confidence about the conclusions we draw though seems way to high given that its clear there are phenomena we don't know about.