Up' is a concept based on seeing oneself as the centre of reference, which only applies in the context of the Earth. Outside the Earth, the idea of 'above' loses its meaning because it is tied to gravity. In a sense, 'up' only exists because it defines 'down'. The up arrow can be misleading - it seems to point upwards, but it actually means the starting point or origin. Extending this concept to something larger, such as a house, shows how the placement of such arrows can rotate the building and redefine its orientation in space. In this way, the relationship of objects to direction and gravity is reconceptualised through the definition of coordinates.