Groups > sci.physics.relativity > #655025

Re: Relativistic aberration

From	Thomas Heger <ttt_heg@web.de>
Newsgroups	sci.physics.relativity
Subject	Re: Relativistic aberration
Date	2024-07-17 09:05 +0200
Message-ID	<lfp8pbFkr1mU1@mid.individual.net> (permalink)
References	(7 earlier) <6f498e8663ec0b05b9cd9e03df9b4de4@www.novabbs.com> <tWsKauuW6XViPa1OVHe8GAFt0pY@jntp> <0cb92f486425b83cdc71dbdea3093427@www.novabbs.com> <2EXLnr_H9bJJ03uqOqvAke2Stu0@jntp> <40a7f3651fa003ba04b12ddd79ee55b1@www.novabbs.com>

Show all headers | View raw

Am Dienstag000016, 16.07.2024 um 16:47 schrieb gharnagel:

> 
> Yes, I understand what you're saying.  What needs to be understood is
> just how many molecules make up the normal matter around us (think
> Avogadro's number).  Interstellar space contains between 20 and 50
> hydrogen atoms per cubic cm:
> 
> https://en.wikipedia.org/wiki/Interstellar_medium
> 
> Half of the distance to the Large Magellanic Cloud is outside our
> galaxy,
> so the density is even lower.  At 50/cm3, the entire 168,000 light years
> amounts to only a two meter thickness of hydrogen at STP!  So I'm afraid
> the astrophysicists cannot use that to save their precious
> speed-of-light
> skins.
> 
> "Why is the speed of light so slow when the universe is such a really,
> really big place?" -- G. L. Harnagel



This is a tautology:

What we see in the night sky is actually our own past light-cone.

This means: light is relatively slow for the wastness of the universe, 
hence we can see everything only with a certain delay and the further 
away, the longer the delay, according to x = c* t
(with x= distance in meters, t = delay in seconds).

This 'longer away' is usually measured in light years and the delay in 
years.

Since the night sky shows only a delayed image of past events, the speed 
of light cancels out of the equations and we can put any value into it 
and always get a valid picture of the universe.

So we only assume, that light moves always with ~300 million meters per 
second through the entire universe.

But if light would speed up or slow down, we would not be able to 
measure this, because we always see the own light cone in the night sky 
and c is already embedded into it (for whatever a value c actually has 
in outer space).


TH

Back to sci.physics.relativity | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-14 22:30 +0000
  Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-15 02:52 +0000
    Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-15 07:15 +0200
      Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-15 13:04 +0000
        Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-15 15:08 +0200
    Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-15 11:58 +0000
      Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-15 12:33 +0000
        Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-15 12:55 +0000
          Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-15 16:12 +0000
            Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-15 18:53 +0200
            Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-15 17:01 +0000
            Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-15 17:08 +0000
              Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-15 20:24 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-15 20:59 +0000
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-15 21:54 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-15 22:30 +0000
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-15 23:21 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-16 12:18 +0000
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-16 14:47 +0000
                Re: Relativistic aberration Thomas Heger <ttt_heg@web.de> - 2024-07-17 09:05 +0200
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-17 12:05 +0000
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-17 14:16 +0200
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-17 20:26 +0000
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-17 23:34 +0200
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-18 02:10 +0000
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-18 05:41 +0200
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-31 15:23 +0000
                Re: Relativistic aberration Reign Batura <nuinr@giu.ru> - 2024-07-18 14:30 +0000
                Re: Relativistic aberration Thomas Heger <ttt_heg@web.de> - 2024-07-18 08:33 +0200
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-18 13:02 +0000
                Re: Relativistic aberration Thomas Heger <ttt_heg@web.de> - 2024-07-19 12:08 +0200
                Re: Relativistic aberration Python <python@invalid.org> - 2024-07-19 12:20 +0200
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-07-19 10:34 +0000
                Re: Relativistic aberration Thomas Heger <ttt_heg@web.de> - 2024-07-20 08:11 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-01 00:03 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-15 22:44 +0000
  Re: Relativistic aberration Sylvia Else <sylvia@email.invalid> - 2024-07-31 11:04 +0800
    Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-31 06:52 +0200
      Re: Relativistic aberration Python <python@invalid.org> - 2024-07-31 07:03 +0200
        Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-31 08:08 +0200
        Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-31 15:10 +0000
          Re: Relativistic aberration "Paul.B.Andersen" <relativity@paulba.no> - 2024-08-01 11:32 +0200
            Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-01 13:37 +0200
            Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-01 11:39 +0000
              Re: Relativistic aberration Python <python@invalid.org> - 2024-08-01 14:17 +0200
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-01 15:05 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-01 13:29 +0000
                Re: Relativistic aberration Python <python@invalid.org> - 2024-08-01 15:33 +0200
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-01 16:26 +0200
                Re: Relativistic aberration Python <python@invalid.org> - 2024-08-01 16:35 +0200
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-01 16:55 +0200
                Re: Relativistic aberration Python <python@invalid.org> - 2024-08-01 17:02 +0200
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-01 17:35 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-01 16:34 +0000
                Re: Relativistic aberration Athel Cornish-Bowden <me@yahoo.com> - 2024-08-01 17:30 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-01 17:31 +0000
              Re: Relativistic aberration "Paul.B.Andersen" <relativity@paulba.no> - 2024-08-01 20:04 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-01 20:38 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-01 20:44 +0000
                Re: Relativistic aberration "Paul.B.Andersen" <relativity@paulba.no> - 2024-08-02 22:53 +0200
                Re: Relativistic aberration Dino Todorsky <idndr@kindsdi.ru> - 2024-08-02 21:49 +0000
              Re: Relativistic aberration "Paul.B.Andersen" <relativity@paulba.no> - 2024-08-01 22:06 +0200
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-01 22:57 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-01 21:30 +0000
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-02 06:23 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-01 21:03 +0000
                Re: Relativistic aberration "Paul.B.Andersen" <relativity@paulba.no> - 2024-08-02 21:49 +0200
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-02 22:07 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-02 20:24 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-02 20:51 +0000
                Re: Relativistic aberration "Paul.B.Andersen" <relativity@paulba.no> - 2024-08-03 19:44 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-03 19:40 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-02 20:59 +0000
                Re: Relativistic aberration "Paul.B.Andersen" <relativity@paulba.no> - 2024-08-03 20:36 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-03 20:04 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-02 21:17 +0000
                Re: Relativistic aberration Mitsuharu Sakakibara <aair@srkkrr.jp> - 2024-08-03 10:54 +0000
                Re: Relativistic aberration "Paul.B.Andersen" <relativity@paulba.no> - 2024-08-03 22:28 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-03 21:23 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-03 21:40 +0000
                Re: Relativistic aberration "Paul.B.Andersen" <relativity@paulba.no> - 2024-08-04 14:50 +0200
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-04 14:57 +0200
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-04 14:28 +0000
                Re: Relativistic aberration Egorov Zheludkov <kzaoko@jlhekj.ru> - 2024-08-04 16:19 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-04 14:30 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-03 21:45 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-03 21:50 +0000
                Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-08-02 21:52 +0000
                Re: Relativistic aberration Conard Demakis <dd@sirrd.gr> - 2024-08-02 23:02 +0000
              Re: Relativistic aberration Mikko <mikko.levanto@iki.fi> - 2024-08-02 12:12 +0300
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-02 11:46 +0200
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-08-02 13:06 +0000
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-02 16:15 +0200
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-08-02 18:00 +0000
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-02 20:33 +0200
                Re: Relativistic aberration hitlong@yahoo.com (gharnagel) - 2024-08-02 18:50 +0000
                Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-08-02 21:12 +0200
            Re: Relativistic aberration Milton Tolboev <lo@vtno.ru> - 2024-08-01 12:39 +0000
          Re: Relativistic aberration Mikko <mikko.levanto@iki.fi> - 2024-08-02 12:04 +0300
    Re: Relativistic aberration nospam@de-ster.demon.nl (J. J. Lodder) - 2024-07-31 12:50 +0200
      Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-31 15:45 +0200
    Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-31 14:30 +0000
      Re: Relativistic aberration Sylvia Else <sylvia@email.invalid> - 2024-08-01 00:38 +0800
        Re: Relativistic aberration Richard Hachel <r.hachel@wanadou.fr> - 2024-07-31 17:12 +0000
        Re: Relativistic aberration Maciej Wozniak <mlwozniak@wp.pl> - 2024-07-31 20:37 +0200

csiph-web