Instant Gravity : Proof

[WaterBreather]

Follow this link:

http://flight-light-and-spin.com/proof/instant-gravity.htm

...to see an astonishingly simple proof
that gravity is actually instantaneous
and does not travel at the velocity of
light as the relativists believe it to.

Do yourself a favor and take a day or two
thinking about it before commenting.

 

[Skeptic Ginger]

Do us a favor and tell us a bit more. Because this looks like spam.

 

[p0lka]

what a lot of tosh.

 

[Dr.Sid]

Hm .. I can't really tell what's wrong about the idea .. I believe evil relativists thought about it, but I don't know about it ..

 

[Steve001]

It seems to be the thoughts of a one Jonathan Ainsley Bain. Here's a link. http://exploringyourmind.forumotion.com
He also has a Facebook page. He appears to be a crank.

 

[Molinaro]

If they modeled the gravity as a circular expanding wave extending out from one body until it struck the other then their straight line arrows would be seen as the nonsense that they are.

 

[The Man]

If they modeled the gravity as a circular expanding wave extending out from one body until it struck the other then their straight line arrows would be seen as the nonsense that they are.

Yep, it's not "gravity" that travels at the speed of light but changes in the space-time curvature. AKA a gravitational wave. Just once I'd like to see someone who comes here to refute general relativity actually include general relativity in that refutation. All they demonstrate is that Newtonian gravity has to be instantaneous to be consistent with (well some) observational data.

 

[baron]

Yeah, all that could have been avoided if he'd realised gravity isn't some kind of repeated pulse sent out from the same point, rather a distortion of space-time. If the central object flickered in and out of existence then what he suggests would happen, otherwise not so much.

 

[Squeegee Beckenheim]

Just add water?

 

[Squeegee Beckenheim]

Oh, and you misspelt "poof".

 

[Roger Ramjets]

gravity is actually instantaneous

Correct.

and does not travel at the velocity of
light

Wrong. Light is also instantaneous.

If you traveled at the speed of light, would the universe appear instantaneous?

Yes.

 

[Loss Leader]

Yep, it's not "gravity" that travels at the speed of light but changes in the space-time curvature.

My understanding is that space-time expanded at speeds far in excess of light during the early moments of the universe.

 

[John Jones]

Follow this link:

http://flight-light-and-spin.com/proof/instant-gravity.htm

...to see an astonishingly simple proof
that gravity is actually instantaneous
and does not travel at the velocity of
light as the relativists believe it to.

Do yourself a favor and take a day or two
thinking about it before commenting.

The name sounds familiar. Are your ideas considered woo or crackpottery in skeptical/scientific circles?

 

[Ziggurat]

This is one of those cases where somebody stumbles upon an actually interesting problem, with some deep and important physics behind it, but then totally and completely screws up the answer.

It's absolutely true that Newtonian gravity (which propagates instantly) will give you stable orbits for binary pairs. Furthermore, it's even true that if the propagation speed for gravity is not infinite, as in General Relativity, you cannot have stable orbiting pairs. But none of the rest of the argument follows. The gravitational fields of moving bodies are not simple. You can't get them by just looking at the time-delayed position of where the object was. This isn't controversial either, the exact same effect is readily observable with moving electric charges, and leads directly to magnetism. Similar stuff happens with gravity. But if you do the calculations right (and they haven't even come close to doing so), the orbits aren't unstable because they spiral outwards, they're unstable because they spiral inwards.

And again, these effects are observable with electric charges (where we know the propagation speed of the field quite well). They're even observable with gravity. Binary orbits decay. They shouldn't, if Newtonian gravity was correct. But it isn't, so they do.

None of this is controversial. None of it is even mysterious. But it does require actually knowing more than high school physics. And the author obviously doesn't.

 

[Reality Check]

Follow this link:

http://flight-light-and-spin.com/proof/instant-gravity.htm

What I see is someone not recognizing a typically ignorant and lying crank web site.

An ignorant crank with a "orbital simulator" that obviously does not work - it violates conservation of energy with orbiting bodies magically spiraling outward .

The crank idiotically using Newtonian gravitation for a pair of stars closer together than Mercury is to the Sun. It is the orbit of Mercury that showed that Newtonian gravitation does not work for strong gravitational fields !

Newtonian gravitation assumes that the speed of the force of gravity is infinite but has no explicit derivation of the speed of gravity .

General relativity states that there is no force and so no speed of the force of gravity. The speed of changes in gravitational fields is derived as the speed of light.

We have been measuring neutron stars in binary systems spiraling into (not the lie of outward) their primary for decades which is indirect evidence of gravitational waves traveling at finite speeds. The LIGO detection of gravitational waves includes that they are travelling at the speed of light.

 

[gerdbonk]

Do yourself a favor and take a day or two
thinking about it before commenting.

How many days did you take to think before posting this?

 

[smartcooky]

The OP (and the crank in his link) have fallen at the first step, by proceeding under the premise that gravity is a force acting between two bodies... it isn't

Massive objects cause a distortion in space-time, which is perceived as gravity, objects orbit each other because they are affected by the distortion.

Go back to year 9 physics class (if you ever attended in the first place!)

 

[EHocking]

Follow this link:

http://flight-light-and-spin.com/proof/instant-gravity.htm

...to see an astonishingly simple proof
that gravity is actually instantaneous
and does not travel at the velocity of
light as the relativists believe it to.

Do yourself a favor and take a day or two
thinking about it before commenting.

Rather coincidentally I watched the telemovie "Einstein and Eddington" the other night.

Well worth the price of admission.

 

[baron]

My understanding is that space-time expanded at speeds far in excess of light during the early moments of the universe.

That was space time itself. Distortions within space time are limited to c.

 

[Loss Leader]

That was space time itself. Distortions within space time are limited to c.

Thanks. I'm clearly out of my depth here.