Doppler Shift

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Doppler Shift
« on: June 10, 2006, 03:56:09 AM »
I was curious how you explain the Doppler Shift (something that is used plannetery for blood flow, and can be shown from cars passing you at speed) that indicates that certain stellar bodies are moving towards us, and away from us at certain speeds due to a blue or a red shift that is seen?

some stellar objects go from Blue to Red shift, therefore implying that they are going towards and then away from us, therefore they cannot have a constant "upwards" gravity that is suggested, yet we have not caught these stellar objects yet.


And if the FE theory gives a younger date of the Earth, how do you explain the radioactive decay of Uranium (Which dates the Earth rather exactly) and that we can see approximately 14 billion light years away (i'm guessing you don't beleive in the ether theory, and you agree that the speed of light is absolute)

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Erasmus

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Re: Doppler Shift
« Reply #1 on: June 10, 2006, 11:39:02 AM »
Quote from: "DrQuak"
I was curious how you explain the Doppler Shift (something that is used plannetery for blood flow, and can be shown from cars passing you at speed) that indicates that certain stellar bodies are moving towards us, and away from us at certain speeds due to a blue or a red shift that is seen?


Which stellar bodies are moving towards us?

Quote
some stellar objects go from Blue to Red shift, therefore implying that they are going towards and then away from us, therefore they cannot have a constant "upwards" gravity that is suggested, yet we have not caught these stellar objects yet.


They can have a constant upwards acceleration (not gravity) as suggested, couples with some other form of motion.

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And if the FE theory gives a younger date of the Earth, how do you explain the radioactive decay of Uranium (Which dates the Earth rather exactly) and that we can see approximately 14 billion light years away (i'm guessing you don't beleive in the ether theory, and you agree that the speed of light is absolute)


I think the original FE theory in fact did attempt to support the Aether theory.  As for the age of the Earth/universe, I don't see how the current FE model stipulates any particular age.
Why did the chicken cross the Möbius strip?

Re: Doppler Shift
« Reply #2 on: June 11, 2006, 03:56:41 PM »
Quote from: "Erasmus"
Which stellar bodies are moving towards us?


If an inner planet was in its orbit and was about to pass between the sun and the earth it would be getting closer to earth. Then when it passed the point of being inbetween it would be getting further away.

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Erasmus

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Re: Doppler Shift
« Reply #3 on: June 11, 2006, 04:40:38 PM »
Quote from: "MiniCooper"
If an inner planet was in its orbit and was about to pass between the sun and the earth it would be getting closer to earth. Then when it passed the point of being inbetween it would be getting further away.


Indeed.  In that case, I think that as such FE theory cannot explain this shiftng.

*edit* The only caveat is that, according to my calculations, the maximum blueshift of an approaching Mercury is a factor of 1.0002 (i.e. if the light would have frequency f in a comoving frame, it has frequency 1.0002f when measured on Earth).  I'm not familiar with the tools used to measure blueshift; however, it's possible that they are not sensitive enough to resolve this small a shift.
Why did the chicken cross the Möbius strip?

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6strings

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Doppler Shift
« Reply #4 on: June 11, 2006, 04:55:05 PM »
Quote
I'm not familiar with the tools used to measure blueshift; however, it's possible that they are not sensitive enough to resolve this small a shift.

Even if they are, the ones you or I could make would most definately be unable to.  And then: *Conspiracy card*

Although I'm sure that with enough imagination, one could explain why the planet would be traveling towards, and then away from us...

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Erasmus

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Doppler Shift
« Reply #5 on: June 11, 2006, 05:22:43 PM »
Quote from: "6strings"
Although I'm sure that with enough imagination, one could explain why the planet would be traveling towards, and then away from us...


True, and, failing that, we could probably come up with some explanation as to why the redshift/blueshift occurs (i.e. for some reason other than relative motion).
Why did the chicken cross the Möbius strip?

Doppler Shift
« Reply #6 on: June 11, 2006, 05:27:12 PM »
You could use your imagination and come to alternate reasons for everything. That doesn't mean the reasoning is correct.
y the power of truth, I, a living man, have conquered the universe.

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Erasmus

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Doppler Shift
« Reply #7 on: June 11, 2006, 05:37:12 PM »
Quote from: "Welbourne"
You could use your imagination and come to alternate reasons for everything. That doesn't mean the reasoning is correct.


What's the point of this statement?
Why did the chicken cross the Möbius strip?

Doppler Shift
« Reply #8 on: June 11, 2006, 05:43:29 PM »
6strings post, stating that with enough imagination one could explain why a planet was moving towards, and then away from Earth. With imagination you could come up with an infinite amount of reasons why.

I guess my statement actually relates to what you were saying, too.
y the power of truth, I, a living man, have conquered the universe.

?

Erasmus

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Doppler Shift
« Reply #9 on: June 11, 2006, 05:54:52 PM »
Quote from: "Welbourne"
6strings post, stating that with enough imagination one could explain why a planet was moving towards, and then away from Earth. With imagination you could come up with an infinite amount of reasons why.


I realize what the post meant, and what it was referring to; I'm just not sure why you pointed it out.  Obviously I could imagine all sorts of things that aren't true, like "0 = 1", "I use soap made from unicorns' hooves" etc.  I don't need to be told that not everything I imagine is true.

On that note, it may interest you to know that not everything one can imagine is false.

Really, it turns out that the fact that somebody imagined something has pretty much no bearing on whether or not it's true.  That why I was wondering why made that comment.
Why did the chicken cross the Möbius strip?

Doppler Shift
« Reply #10 on: June 11, 2006, 05:57:58 PM »
Because he statement came off like, "Oh, we don't have an answer for that - We'll just think up one later." Maybe there was no need for my post. Anyways.
y the power of truth, I, a living man, have conquered the universe.

?

Erasmus

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Doppler Shift
« Reply #11 on: June 11, 2006, 06:26:11 PM »
Quote from: "Welbourne"
Because he statement came off like, "Oh, we don't have an answer for that - We'll just think up one later."


Maybe that's what he meant... no FEer claims to know the whole story, and we realize that we may find flaws in the model that need to be corrected.  Then again, isn't that how science works?
Why did the chicken cross the Möbius strip?

Doppler Shift
« Reply #12 on: June 11, 2006, 06:39:55 PM »
The conclusions that science come to are usually able to be proven using science. Like I've said before, I'm not a scientist, so I can't really argue for the previous sentence.
y the power of truth, I, a living man, have conquered the universe.

*

TheEngineer

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Doppler Shift
« Reply #13 on: June 11, 2006, 07:49:45 PM »
Quote from: "Welbourne"
The conclusions that science come to are usually able to be proven using science. Like I've said before, I'm not a scientist, so I can't really argue for the previous sentence.

Not too long ago, the atom was thought to be the smallest unit of matter.  However, science proved this wrong.  Conclusions put forth by science are not always correct.


"I haven't been wrong since 1961, when I thought I made a mistake."
        -- Bob Hudson

Doppler Shift
« Reply #14 on: June 11, 2006, 07:52:41 PM »
Oh, okay. Check out my last sentence from that post.
y the power of truth, I, a living man, have conquered the universe.

*

TheEngineer

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Doppler Shift
« Reply #15 on: June 11, 2006, 08:07:22 PM »
I read it.  I was arguing the point for you.


"I haven't been wrong since 1961, when I thought I made a mistake."
        -- Bob Hudson

Doppler Shift
« Reply #16 on: June 12, 2006, 02:57:06 AM »
As i beleive i have said elsewhere i am no astronomer.

But due to the rotating nature of the galaxy (Which rotates pretty fast) there is a lot of motion towards and away from the Earth at large enough speeds to see the doppler shift.

and .02% difference isn't all that hard (considering to measure Gravitational waves we need measurements far more exact than that) it would be hard to do in your backyard, but with computer imaging and a professional telescope...