Changing the rotation of a natural satellite

AI Thread Summary
Changing the rotation of a planet or moon is theoretically possible with advanced technology and immense resources. Proposed methods include building large engines on the equator to exert force and alter angular momentum or colliding the celestial body with a massive object traveling in the opposite direction. The feasibility of these methods depends on the specific goals and the time frame allowed for the changes. While the ideas are intriguing, practical implementation remains highly speculative. Overall, the discussion highlights the challenges and considerations involved in such a monumental task.
LF_Ent
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Pardon me for my ignorance -- and naivety, if this question idicates it -- but would it be possible to change the rotation of a planet or moon? We'll assume the hypothetical people attempting this project have a nearly infinite budget, but even with quadrillions of dollars, is this even plausible? Thanks.
 
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Build very big engines on the equator - push out sufficient amount of mass at high enough speed to reverse the planet/moons angular momentum.
Hit planet/moon with a very big object going very fast in the opposite direction to it's current rotation
 
The engines don't have to be big if you are very patient. All depends on your success criteria.
 
Oh. I thought about the first one, but wasn't sure if it would really work. Thanks.
 

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