Re: OT: Gravity, Dark Energy, Universal expansion
 

Given enough energy, matter & antimatter can be created by pair production.

Re: OT: Gravity, Dark Energy, Universal expansion
 

I see. of course I should have said energy cannot be created or destroyed. my mistake.

Re: OT: Gravity, Dark Energy, Universal expansion
 

Just Finished scanning this topic. Gravity is nothing, black holes are mathematical expressions of Newtonian physics. The reality is we have an electric universe that easily explains what we are seeing. The next time you see that Scientist are "surprised" at what they find in outer space please question in your mind if our current theory is correct why are they surprised? The electric universe easily explains what we are seeing and how things work.Try to think past Newton and realize that Gravity is really weak.

http://www.thesurfaceofthesun.com/

http://www.mikamar.biz/book-info/tes-a.htm

Re: OT: Gravity, Dark Energy, Universal expansion
 

Re: OT: Gravity, Dark Energy, Universal expansion
 

I haven't read these, but generally the problem with an EM structure is propagation speed of EM forces being c, creating a lag that doesn't correspond to observation.

Re: OT: Gravity, Dark Energy, Universal expansion
 

I thought they'd just about concluded that even gravity was limited to c?

Re: OT: Gravity, Dark Energy, Universal expansion
 

Unless a lot of old observations were way off... objects appear attracted to about where the mass is, not where it was d/c ago.

Re: OT: Gravity, Dark Energy, Universal expansion
 

Well, the first source starts spouting nonsense by the second sentence. The surface of the Sun is made of neon?

The second beats on astronomers using a classic "straw man" argument, but doesn't go much further than that.

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Regarding the speed of gravity, general relativity predicts that it's limited to the speed of light. I don't know if it has been successfully measured. I think some observations may have been made of binary pulsars, but again I don't know the result.

Re: OT: Gravity, Dark Energy, Universal expansion
 

There are a number of observations that do indicate that:
http://en.wikipedia.org/wiki/Speed_o...measurement.3F


As MCT mentioned, however, the earth accelerates towards where the sun *is*, not where it was 8 minutes ago.
Otherwise the earth's orbit would be quite unstable, and we'd all go spinning off into space.

So, there seems to be a relativistic effect that mostly cancels out the lag for slowly moving things.

Re: OT: Gravity, Dark Energy, Universal expansion
 

Hmm, I don't get it. Why would the earth's orbit be unstable? I mean, the sun travels at a constant speed, doesn't it? And the gravitational pull is continous, even if there is 'lag'. So the worst thing I can picture is that the earth will be travelling a tiny bit closer to the sun on one side and a little further behind on the other.