See, it the “up” part in the first sentence you have all wrong. There is no up. Showing the earth with the North Pole as up is merely convention. It would be just as correct to flip it over and have the South Pole at the top (as viewed while standing on earth). We put the solar system “flat” with the planets orbiting in the direction they do only as convention, there is no up or down in the absence of gravity.

Think of it like this. Up is always pointing away from the center of earth. Down is always pointing towards the center.