Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics > #630737

Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings

Show all headers | View raw

Edward Prochak <edprochak@gmail.com> writes:

>On Monday, April 24, 2017 at 11:03:41 AM UTC-4, Archimedes Plutonium wrote:

>> Now the Spiral Galaxies, most of them have this
>> Solid Body Rotation, of its stars close in and
>> out to the edge. Not that it is a one disc,
>> but rather millions of stars moving with Velocity
>> proportional to radius.

>Approximately, yes. This is one of the first pieces
>of evidence of dark matter.

Not quite.  It has been observed that each star has (approximately)
the same *speed*, regardless of its distance from the center.  That
means that a star twice as far from the center takes (approximately)
twice as long to orbit the center.  Solid body rotation would have
the star twice as far from the center move twice as fast, in order for
it to take the same time to orbit once because its path is twice as long.
Like the outer vs. inner tracks of a record on a record player.

In the solar system, by contrast, not only does Mercury take less time
to orbit the sun than Neptune because it has a shorter path, it also takes
less time because it is also moving much faster than Neptune.

>> So maybe to cut confusion I should just say 
>> 
>> Stars motion V proportional to R

>In some galaxies, true.

Again, what is observed was V ~ constant for most spiral galaxies. They
expected V to decrease as distance from the center as distance increased,
somewhat like the solar system.
See Ford's and Rubin's papers on galaxy observations.

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

Thread

Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-24 01:35 -0700
  Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings HVAC <mr.hvac@gmail.com> - 2017-04-24 06:07 -0700
    Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-24 06:16 -0700
    Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings benj <benj@nobody.net> - 2017-04-24 16:21 -0400
  Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Edward Prochak <edprochak@gmail.com> - 2017-04-24 06:38 -0700
    Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-24 06:54 -0700
      Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Edward Prochak <edprochak@gmail.com> - 2017-04-24 07:43 -0700
        Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-24 08:03 -0700
          Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-24 19:22 -0700
            Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-25 13:46 -0700
          Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Edward Prochak <edprochak@gmail.com> - 2017-04-25 14:44 -0700
            Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-25 15:17 -0700
              important knowledge Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-26 15:39 -0700
                Re: important knowledge Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Edward Prochak <edprochak@gmail.com> - 2017-04-27 10:22 -0700
                Re: important knowledge Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-27 15:10 -0700
                Re: important knowledge Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Edward Prochak <edprochak@gmail.com> - 2017-04-28 11:09 -0700
                Univ Dayton physics too dumb to know Newton's gravity works only with F= m(a1+a2) not F=ma Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-28 20:07 -0700
                Re: Archimedes Plutonium too dumb to know Newton's gravity works only with F= m(a1+a2) not F=ma Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-04-29 06:37 +0000
                Univ Dayton physics too dumb to know Newton's gravity works only with F= m(a1+a2) not F=ma Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-29 00:32 -0700
                Univ Dayton physics too dumb to know Newton's gravity works only with F= m(a1+a2) not F=ma Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-29 14:03 -0700
                Dayton can always feel proud in science-- Wright Bros. first flight Re: Univ Dayton physics too dumb to know Newton's gravity works only with F= m(a1+a2) not F=ma Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-29 14:31 -0700
                Gravity, in order to work, has two accelerations involved, not one but two//Newton's gravity works only with F= m(a1+a2) not F=ma Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-29 21:52 -0700
                Univ Dayton physics too dumb to know Newton's gravity works only with F= m(a1+a2) not F=ma Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-30 01:26 -0700
                Univ Dayton physics too dumb to know Newton's gravity works only with F= m(a1+a2) not F=ma Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-30 16:35 -0700
                Cassini's death, my dear Stumper's death Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-27 17:50 -0700
                Cassini's death, my dear Stumper's death Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-27 20:38 -0700
                Re: Cassini's death, my dear Stumper's death Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Howler Monkey <alouatta.coibensis@gmail.com> - 2017-04-27 21:13 -0700
                Re: Cassini's death, my dear Stumper's death Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-04-29 18:55 +0000
                Cassini's death, my dear Stumper's death Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Archimedes Plutonium <plutonium.archimedes@gmail.com> - 2017-04-27 23:33 -0700
                Re: Cassini's death, my dear Stumper's death Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation Edward Prochak <edprochak@gmail.com> - 2017-04-28 11:11 -0700
                Re: Cassini's death, my dear Stumper's death Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation HVAC <mr.hvac@gmail.com> - 2017-04-29 03:20 -0700
            Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-04-26 14:19 +0000
              Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings Edward Prochak <edprochak@gmail.com> - 2017-04-27 10:19 -0700
      Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-04-26 14:01 +0000
  Re: Have Cassini scar the Rings of Saturn and with Earth telescopes, prove the Rings are Solid Body Rotation// also dock Cassini in the Rings "reber G=emc^2" <herbertglazier0@gmail.com> - 2017-04-30 12:27 -0700

csiph-web