You shouldn't. I can imagine 10,20,100,300 piece "things" at maximum. I think I can guess a distance of about 20 km with my eyes. Maybe a bit more. I did some traveling to Greece this summer with airplane (first time ever). My senses were pretty fooled, and looking out the window was a terrific experience. I only flew an hour but it seemed to be an almost infinite distance from the air.. I have a telescope at home and several books of astronomy, spent some time to watch the stars some years ago. I'm pretty sure that for such galactic scales the human mind isn't really prepared. I mean the Jupiter is simple too big for me to imagine it's sizes. Hell, the moon is pretty large too! So as for that big red thing in the end... Ummm, unga-bonga, that huge is really bonga, me eat.