Re: OT Cheap shots - was Ron Paul & Gov't Agencies

Will Sill wrote:

<snip>

For example, there is virtually unanimous agreement among astronomers
that objects at the "outer edges" of observable space are moving away
from our plant at speeds approaching the speed of light. No
genius-level reasoning should be needed to recognize that objects on
opposite "sides" of the universe are moving _faster_ than the speed of
light WITH RESPECT TO EACH OTHER.

<snip>


Wrong.

"The red shift of a distant galaxy or quasar is easily measured by comparing
its spectrum with a reference laboratory spectrum. Atomic emission and
absorption lines occur at well-known wavelengths. By measuring the location
of these lines in astronomical spectra, astronomers can determine the red
shift of the receding sources.

However, to be accurate, the red shifts observed in distant objects are not
exactly due to the Doppler phenomenon, but are rather a result of the
expansion of the Universe.
Doppler shifts arise from the relative motion of source and observer through
space, whereas astronomical redshifts are 'expansion redshifts' due to the
expansion of space itself.

Two objects can actually be stationary in space and still experience a red
shift if the intervening space itself is expanding.

A convenient analogy for the expansion of the Universe is a loaf of unbaked
raisin bread. The raisins are at rest relative to one another in the dough
before it is placed in the oven. As the bread rises, it also expands, making
the space between the raisins increase.

If the raisins could see, they would observe that all the other raisins were
moving away from them although they themselves were stationary within the
loaf. Only the dough - their 'Universe' - is expanding."

http://www.esa.int/esaSC/SEM8AAR1VED_index_0.html


--
Kevin W. Miller
http://www.bluemoongemworks.com/rv/index.asp


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