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Military Has Been Researching "Anti-Gravity" For Nearly 70 Years

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Re: Military Has Been Researching "Anti-Gravity" For Nearly 70 Years

#101
post #51

Earlier quoted context omitted.

That's a great and important question. (doubly so for me, as constrained resources may see me leave the field, to which I have devoted my entire professional life, in the coming months) We are perennially grateful for the support we receive to do the work that we do. To a high degree of approximation, Einstein's predictions are very, very correct. We are trying to look very carefully at Nature because we don't think…

Some argue that keeping talented people out of industry is a downside of the sciences not an upside. Personally, particle physics irritates me because I don't believe in particles... It's all vibrations, man :)

I see it as the organizational abstraction of industry is an side-effect artifact of relative material scarcity, and a current, hopefully temporary condition in our species' evolution towards a future when advancing sciences becomes one of the major focal points of our endeavors, and the bulk of industry is largely automated away in the trail of a continuously-growing wavefront of advanced-and-advancing industry. Hopefully capitalism and industry will bootstrap us into that outcome, instead of mediocrely settling for a local maxima of extractive rentier structures. "Money is a sign of poverty", wrote Iain M. Banks, and I suspect the transition to that kind of wealth is an evolving continuum instead of an abrupt, sharp discontinuity.

Re: Military Has Been Researching "Anti-Gravity" For Nearly 70 Years

#103

To really be able to manipulate gravity, you would also need to manipulate mass, and so far nuclear is the only way I know of, in which we do that, but uhh.. I don't think we'll get anti gravity until we can control mini stars... Little nuclear engines.

What if gravity isn't always relative to mass? I mean, all of our scientific evidence suggests it is... but I suppose it's possible that's not quite right.

Actually we know that gravity in fact not due to mass. Mass is just one component of what actually interacts with gravity.

Re: Military Has Been Researching "Anti-Gravity" For Nearly 70 Years

#105

I love the following Feynman's quote: ``In those days, one of the theories proposed was that the planets went around because behind them were invisible angels, beating their wings and driving the planets forward. You will see that this theory is now modified! It turns out that in order to keep the planets going around, the invisible angels must fly in a different direction and they have no wings. Otherwise, it is a s…

> why mass attracts mass

What kind of answer could you get for that kind of question?

Seems to me that "Why?" Is the question you can ask endlessly of any answer.

Often I think a "why?" questions is just a request for a compelling narrative... Maybe that is literaly what "why?" means?

Re: Military Has Been Researching "Anti-Gravity" For Nearly 70 Years

#106
post #80

Earlier quoted context omitted.

Wow, what an excellent way of phrasing it. Give me more. Why "any movement is circular"?

It seems to me that, as soon as there is mass in the universe which curves space-time, all paths of movement are closed. To a first approximation, for anything close to a single large mass that means an elliptical path. That assumes, of course, that an instantaneous "path of movement" is something that is even worth considering, given that it ignores the time dimension and the fact that all those other objects aren't…

I would think that parabolic trajectories only close in infinity, and hyperbolic not even there? Or both close only in infinity? The math on that is currently out of my brain's cache.

Re: Military Has Been Researching "Anti-Gravity" For Nearly 70 Years

#107
post #90

Earlier quoted context omitted.

Some argue that keeping talented people out of industry is a downside of the sciences not an upside. Personally, particle physics irritates me because I don't believe in particles... It's all vibrations, man :)

> Some argue that keeping talented people out of industry is a downside of the sciences not an upside. Yeah, instead of understanding the universe and core applications we could have more BS gadgets...

Think of the ads that could've been served!

Re: Military Has Been Researching "Anti-Gravity" For Nearly 70 Years

#108
> Throughout his career, Witten conducted research into gravitation, quantum gravity, and general relativity. The last one of these is the theory first put forward by Albert Einstein that proposes that gravity is essentially a warp or curve in the geometry of space-time caused by mass.

You're assuming that your readers are already familiar with quantum gravity, but need an introduction to general relativity?

Re: Military Has Been Researching "Anti-Gravity" For Nearly 70 Years

#109
post #51
post #46

Earlier quoted context omitted.

How much money does society need to spend supporting the work you do before we can safely conclude that Einstein was actually correct and we don't need to test it any more?

That's a great and important question. (doubly so for me, as constrained resources may see me leave the field, to which I have devoted my entire professional life, in the coming months) We are perennially grateful for the support we receive to do the work that we do. To a high degree of approximation, Einstein's predictions are very, very correct. We are trying to look very carefully at Nature because we don't think…

Short-termism, and the financialization of research, seems to be a huge problem in all fields of science.

By "financialization," I mean deciding which research projects get funding based on their expected measurable results, i.e., based on some rate of return that can be estimated today. If a research project can lead to more citations soon, or slightly better products soon, or lower costs soon, etc., it will get funding. Otherwise, it will not.

As a consequence, research projects with uncertain payoff but potentially transformational long-term benefits are... neglected.

:-(

Re: Military Has Been Researching "Anti-Gravity" For Nearly 70 Years

#110
post #68

Earlier quoted context omitted.

Don't bet more than you can afford to lose.

Make me a hover board, get to work!

He is working on it. Give him more money and he will hire more assistants, and in turn make progress faster.

Of course you are risking that he eventually proves your hover board is impossible.

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