4. Why are spaceships provided with heat shield ?
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Heat shields are essentially used as the brakes to stop spacecraft burning up and crashing on entry and re-entry into a planet's atmosphere. ... Planets with atmospheres, such as Earth and Mars, allow spacecraft to utilise aerodynamic drag to slow down and the prototype's design uses this to enable atmospheric entry.
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Explanation:
Heat shields are essentially used as the brakes to stop spacecraft burning up and crashing on entry and re-entry into a planet's atmosphere. ... Planets with atmospheres, such as Earth and Mars, allow spacecraft to utilise aerodynamic drag to slow down and the prototype's design uses this to enable atmospheric entry
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