chancellortobyiii

chancellortobyiii t1_j5zbkjd wrote

Reply to Why do sample return missions such as OSIRIS-REx use their own reentry vehicles instead of just going to the space station for pickup and return with ISS equipment? by PromptCritical725

I think the real reason is that these sample missions want their success to not be tied to any other infrastructure that would increase the number of possible failures the mission will have.

For example for the Osiris-REx mission, it launched last 2016 and will comeback this 2023. If it had to rendezvous with the ISS for its sample return, you would have to ensure that nothing would happen to the ISS that would jeopardize the sample return. Even if you would say that there are a lot of contingencies for the ISS, 8 years is long enough for a lot of things to happen.

Imagine if something did happen to the ISS then the OSIRIS-REx mission would all be for nothing. The increase in potential failures outweigh the savings.

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chancellortobyiii OP t1_j4atfbn wrote

Reply to comment by r2k-in-the-vortex in A wormhole that connects two points in space where the strength of gravity is different would let you violate the 2nd law of thermodynamics. by chancellortobyiii

I was thinking that as well that wormholes would need enormous amount of work depending on the difference of properties at both ends. Difference in magnetic field, electric field, amount of light etc. not just difference in gravity. That was the whole point of my post... To speculate about how wormholes could violate the 2nd law of thermodynamics and how could it prevent from violating it.

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chancellortobyiii OP t1_j44ffci wrote

Reply to comment by sumknowbuddy in A wormhole that connects two points in space where the strength of gravity is different would let you violate the 2nd law of thermodynamics. by chancellortobyiii

The second law of thermodynamics states that as energy is transferred or transformed, more and more of it is wasted. It's one of the four laws of thermodynamics, which describe the relationships between thermal energy, or heat, and OTHER FORMS OF ENERGY and how energy affects matter.

The 2nd law is not just about heat.

What is thermodynamics? Thermodynamics is the study of the relations between heat, work, temperature, and energy. The laws of thermodynamics describe how the energy in a system changes and whether the system can perform useful work on its surroundings.

Again thermodynamics is not just about heat.

>That energy is simply being applied to the ground all the time in the case of the one on the ground,

Yes, of course the falling billiard will transfer its energy to the ground. The point is the energy it tried to transfer TO THE GROUND is bigger than the energy the second biliard ball tried to transfer to the first billiard ball when it nudged it into the wormhole.

You're the one misguided in your notions.

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chancellortobyiii OP t1_j43izqm wrote

Reply to comment by sumknowbuddy in A wormhole that connects two points in space where the strength of gravity is different would let you violate the 2nd law of thermodynamics. by chancellortobyiii

Just imagine two billiard balls. One ball is near the edge of the wormhole at ground level. Throw a second billiard ball at a very slow speed just to nudge the first billiard ball into the ground level wormhole. The first billiard ball goes in the wormhole, drops 1 kilometer and by the time it reaches the ground again it would have attained a speed greater than the second billiard ball you threw to nudge it in.

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