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noduermetoday at 11:08 AM1 replyview on HN

Could the probe just fire off some mass when it got there?


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Fargrentoday at 11:44 AM

Any mass that it fires would have a starting velocity equal to that of the probe, and would need to be accelerated an equal velocity in the opposite direction. It would be a smaller mass, so it would require less fuel than decelerating the whole probe; but it's still a hard problem.

Be careful with the word "just". It often makes something hard sound simple.

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