The earth is always pulling us to its centre with its gravity, a force to which all bodies on the planet are subjected to. In the beginning of the space program of United States, reduced gravity was an important matter on the general body behavior, making this study as a key on space exploration and transportation, and a capability of testing the personnel and equipment.
White, the colour of most planes are painted. When looking at a ramp at an airport, the fact is clearly evident. The reason airlines choose this is because of several factors ranging from the cost to operational conditions.