Drag

In space and astronautical engineering, drag is the force that opposes the motion of an object through a fluid (such as air or liquid) or a gas (such as the atmosphere). In space, drag is caused by the residual atmosphere, solar wind, and other particles that interact with spacecraft. Drag can cause a decrease in the velocity of a spacecraft, which can affect its trajectory and mission objectives. Engineers must take into account the effects of drag when designing spacecraft and planning missions.

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Drag

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