[Answer] What is aerobraking?

Answer: the technique of using a planetary atmosphere to change the orbit of a spacecraft

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What is aerobraking? Aerobraking - Wikipedia Aerobraking - Wikipedia Aerobraking - Wikipedia Aerobraking - Wikipedia Aerobraking is a spaceflight maneuver that reduces the high point of an elliptical orbit (apoapsis) by flying the vehicle through the atmosphere at the low point of the orbit (periapsis). The resulting drag slows the spacecraft. Aerobraking is used when a spacecraft requires a low orbit after arriving at a body with an atmosphere and it requires less fuel than does the direct use of a rocket engine. Aerobraking is a spaceflight maneuver that reduces the high point of an elliptical orbit (apoapsis) by flying the vehicle through the atmosphere at the low point of the orbit (periapsis). The resulting drag slows the spacecraft. Aerobraking is used when a spacecraft requires a low orbit after arriving at a body with an atmosphere and it requires less fuel than does the direct use of a rocket engine. When an interplanetary vehicle arrives at its destination it must change its velocity to remain in the vicinity of that body. When a low near- circular orbit around a body with substantial gravity (as is required for many scientific studies) is needed the total required velocity changes can be on the order of several kilometers per second. If done by direct propulsion the rocket equation dictat… When an interplanetary vehicle arrives at its destination it must change its velocity to remain in the vicinity of that body. When a low near- circular orbit around a body with substantial gravity (as is required for many scientific studies) is needed the total required velocity changes can be on the order of several kilometers per second. If done by direct propulsion the rocket equation dictates that a large fraction of the spacecraft mass must be fuel. This in turn means the spacecraft is limited to a relatively small science payload and/or the use of a very large and expensive launcher. Provided the target body has an atmosphere aerobraking can be used to reduce fuel requirements. The use of a relatively small burn allows the spacecraft to be captured into a very elongated elliptic orbit . Aerobraking is then used to circularize the orbit. If the atmosphere is thick enough a single pass through it can be sufficient to slow a spacecraft as needed. However aerobraking is typically done with many orbital passes through a higher altitude and therefore thinner region of the atmosphere. This is done to reduce the effect of frictional heating and because unpredictable turbulence effects atmospheric composition and temperature make it difficult to accurately predict the decrease in speed that will result from any single pass. When aerobraking is done in this way there...

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