The most widely accepted theory of planetary formation, known as the nebular hypothesis, maintains that 4.6 billion years ago, the Solar System formed from the gravitational collapse of a giant molecular cloud which was light years across.
Answer:
Wind exists because of differences in air pressure. (Meteorologists call the force that pushes air horizontally between high and low pressure regions the "pressure gradient force.") The resulting rush of air between these two locations is the wind we experience.
