SpaceX’s next few rocket landing attempts will be at sea
…The decision mostly comes down to fuel. Rockets launch up and away from their pad to get into space — remember, rockets don’t go straight up, they follow a parabolic arc. Once the Falcon 9 reaches space and separates from the top of the vehicle, it decelerates and flips around to make the journey back. To return to a ground landing port, the rocket needs extra fuel to reverse the vertical and horizontal distance it has covered. But a floating drone ship can travel away from the launch site and set up shop right underneath the rocket. In this scenario, the rocket doesn’t need as much fuel to travel back to its landing target: it mostly just goes straight down.
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