POV-Ray : Newsgroups : povray.off-topic : The Hubble Ultra Deep Field in 3D : Re: The Hubble Ultra Deep Field in 3D Server Time
3 Sep 2024 21:18:07 EDT (-0400)
  Re: The Hubble Ultra Deep Field in 3D  
From: Le Forgeron
Date: 2 Dec 2010 06:07:02
Message: <4cf77dd6$1@news.povray.org>
Le 02/12/2010 11:25, Phil Cook v2 nous fit lire :
> And lo On Thu, 02 Dec 2010 07:45:38 -0000, Nekar Xenos
> <nek### [at] gmailcom> did spake thusly:
> 
>> On Wed, 01 Dec 2010 20:37:51 +0200, Stephen <mcavoys_at@aoldotcom> wrote:
>>
>>> On 01/12/2010 6:10 PM, Warp wrote:
>>>>    And exactly what is wrong about that statement?
>>>  > ...
>>>
>>> So you are saying that the universe is expanding at a speed faster
>>> than the speed of light?
>>>
>> This looks like a misunderstanding to me. Isn't that like saying if 2
>> cars are moving away from each other each with a speedo reading of
>> 100kph that they are moving at 200kph?
> 
> But they are from each other's perspective. If you stood there and
> watched them drive away you'd see them both doing 100kph, but why is
> your viewpoint more valid than that of either driver's?

Seeing them going away at about 100kph each. In the "about", you must
put the speed of the light... you can neglect it for car, but not galaxy
far far away in the universe. Same goes for a driver, it's also about
200kph, with yet that speed of light to take into account.
(but the red shift for the car is really so small...)


Post a reply to this message

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.