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Re:Webb flies Ariane 5: watch the launch live on 25 December by Mesisio on Friday December 24, 2021 @01:28PM (#29676239)
I guess the acceleration needed to leave orbit might need so much more fuel if you need to do it slowly than doing it fast?

Otherwise it would just take longer.

Re:Webb flies Ariane 5: watch the launch live on 25 December by aliher1911 on Friday December 24, 2021 @02:03PM (#29676649)
Rocket engines could only be throttled down to certain power and manoeuvring thrusters would run out of propellant way before it reaches any orbit. Maybe something like electric propulsion can do it but it will take very long time to make it practical imho.