What technical maneuver precedes atmospheric entry for the first stage during descent?
Answer
Engine restarts in the vacuum of space.
The process for the first stage to safely return to the drone ship is technically demanding. Following separation from the second stage (which continues toward orbit), the first stage performs engine restarts while still in the vacuum of space. These restarts are necessary to slow the massive booster down sufficiently for a controlled atmospheric reentry. This is followed by the controlled terminal burn to ensure a soft landing precisely on the moving target at sea.
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