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date: 18 October 2019

ablation 

Source:
A Dictionary of Astronomy
Author(s):
Ian RidpathIan Ridpath

The wearing away of the outer layers of a body by melting, erosion, vaporization, or some other process due to aerodynamic effects as the body moves at high speed through a planetary atmosphere. Ablation can affect natural bodies such as meteoroids, or artificial objects such as spacecraft. Ablation of a spacecraft’s protective heat shield prevents overheating of the spacecraft’s interior during atmospheric entry.... ...

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