So I've always been a big fan of science fiction (and some science) but not very interested in space. To me Space has always been a huge troll, like standing on a beach 5 thousand years ago where there are no trees (to make boats out of) looking across the water at something that might be land, or might be a cloud with no way to get there. It wasn't until I watched Interstellar and a few other films that I really thought about it. Some time after that I took a photo of Jupiter with very modest photographic equipment and could clearly pick out 3 moons which was kinda cool Recently I watched the ISS whiz past overhead and was explaining to my wife about geostationary satellites and how they are always in the same spot in the sky, then looked up the height of such an orbit, and realised why they are hard to see. (ISS orbital height = 500km, Geostationary orbit height = 35,786 km) I'm aware of the mathematics of orbital heights but was really surprised that Geostationary satellites were this far away. So I wondered to myself how much further away than the moon they were. and had no idea how wrong I was. The moon is 384,400 km away from the earth to put this into perspective if you picked up each known (and probably unknown unless there are more gas giants we don't know about) solar planet and dwarf planet and placed them in a row they would all fit between the earth and the moon. To put it a different way, if the earth was the size of a basketball and the moon was the size of a tennis ball, the tennis ball would orbit the basketball at a distance of 7.37 metres. A lot of you will already know this, some won't, I thought it was pretty interesting.