A rocket is a device that does not need atmospheric oxygen to burn its fuel, since it carries its own, either separately or in chemical combination with fuel. Rockets are propelled forward by gas or liquid being expelled backwards. Rockets work on a fundamental law of motion by Sir Isaac Newton that states, for every action there is an equal and opposite reaction. This helps explain how rockets fly on earth and in space. For example, the rocket fuel is exploded in a controlled way so that the exhaust gas or liquid is sent streaming down out the rocket nozzle and causing the rocket to accelerate up. Rockets are usually shaped like an arrow, with long and slender bodies and fins at the bottom. This shape provides stability for flying straight, and with low air resistance for flying fast. The evolution of the rocket has made it an irreplaceable tool in the exploration of space. For centuries, the ancient Chinese has used rockets for ceremonial and warfare purposes. The Chinese were the first known people to use and make rockets. Wernher Von Braun made a big advancement in rocketry duri......

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