I don't think that you have thought about this question some time.
Up and down, left and right, forwards and behind, north and south and east and west are concepts that just make sense in the Earth because the gravity. We know that up is if we look to the sky and down is if we look to the ground, we also know where is the left and where is the right.
What happens if we were in some where of the space? Directionality doesn't make sense. There isn't up and down, left or right,... because in the space there isn't gravity and we are into the infinite. Where is up and down?
Imagine that you're floating in the void and you think about up side you look up but if you spin upside down and you look up again the up will be where before was the down side because there is no gravity so it's not possible to determine where is the up or down side.
In order to know where is the up or down, left or right, forwards and behind we should know before the dimensions of the space, but as we know the space is infinite so we cannot determinate the tridimensional directions. We don't know whether we are going to the left or to the right, if we are going up or down or if we are moving forward or backward.
If we were travelling into a ship we wouldn't know if we are going to the west or to the east because there isn't north or south, east or west because they are directions in the Earth because of gravity.
In fact in the Earth some similar happens, we look up
if we look to the sky (opposite direction to the gravity) but maybe right now
we are with our heads down but we don't realize cause of gravity or maybe we
are horizontal but we don't realize cause of gravity.
If Earth is attracted by sun's gravity we can say that down will be the sun and up whenever we get away from the sun (so we can orientate ourself respect left and right, forward or backward in the solar system) but if we stop being attracted by celestial body's gravity the directionality doesn't make sense.
Is it interesting? Isn't it?
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