Recent comments in /f/space

anona_moose t1_j5wu1ol wrote

My friend, I sincerely need you to draw a diagram or something, because I really want to know what you're trying to say.

In most simple terms, "down" is the gravitational pull straight line from where you are straight to the core of the Earth. It doesn't matter if you're directly over Spain, Florida, or Antarctica. The Northern or Southern poles don't matter for "down" .. If you took a helicopter and flew directly over the South pole, and jumped out right when you were over it, how do you think you would fall?

16

pbmadman t1_j5wtqx7 wrote

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.

4

Orion113 t1_j5wsvw5 wrote

There is no up in space. Every direction is the same. Superman could be staring at the Earth from space, and flip his whole body around so that Antarctica is "on top" of the Earth, and then fly "down" to it. Or he could flip 90 degrees so Antarctica is "on the side" of the Earth, and fly straight into it.

That Antarctica is placed at the bottom of every map and globe is completely arbitrary, it's not because it's actually up, down, left, or right. It's just there.

14