Re: Guinness World Records: scientific illiteracy?

"msadkins04@xxxxxxxxx" <msadkins04@xxxxxxxxx> wrote in
news:1134595025.270972.255060@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:

> The 2005 edition ("Special 50th Anniversary Edition) of Guinness World
> Records, contrasting "fifty years of change", gives information on the
> category "Remotest known body" (in space) for 2005 and 1955 on page 8.
> The entry for 1955 states in part: "There is reason to believe that
> even remoter nebulae exist but, since it is possible that they are
> receding faster than the speed of light (670,455,000 mph /
> 1,078,992,730 km/h), they would be beyond man's 'observable horizon'."
>
> What theory is this based upon, if any, and how is the apparent
> inconsistency (with relativity's requirement that massive objects
> travel below the speed of light as measured by all observers)
> explained?
>
> Mark Adkins
> msadkins04@xxxxxxxxx

Space itself is expanding. All points are receding apart form each
other. The further two points are, the faster the move apart. At far
enough distances the recessional velocity will exceed C, and those
parts of the universe will be unobservable to us.

(The old balloon analogy)

Imagine blowing up a balloon. On the balloon are two spots. As
the balloon expands, the two spots move apart from each other.
Say that the maximum speed one can travel on the surface of the
balloon is 1 cm/sec. It is entirely possible that if you blow
up the balloon fast enough, and two spots are far enough apart,
that they will move apart faster than 1 cm/sec.

The surface of the balloon is two dimensional, but is expanding
in 3 dimension. Our universe is 3 dimensional and expanding in
4. It is entirely possible that due to the expansion of our
universe that two points within are far enough apart that the
expansion is pulling them apart faster than the speed of light.

Brian
--
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