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Groups > sci.physics > #586166
| From | moroney@world.std.spaamtrap.com (Michael Moroney) |
|---|---|
| Newsgroups | sci.physics |
| Subject | Re: Time Must Have a Universe Equation |
| Date | 2016-06-22 15:29 +0000 |
| Organization | The World : www.TheWorld.com : Since 1989 |
| Message-ID | <nkeat2$usj$2@pcls7.std.com> (permalink) |
| References | (6 earlier) <add6c8f8-9502-44a7-be69-2b799839a42d@googlegroups.com> <nka6os$h7c$1@pcls7.std.com> <e0e7b5a3-db77-48c3-85bf-29ea060a8c4d@googlegroups.com> <nkc7sq$hq7$2@pcls7.std.com> <392269cf-48e7-4685-ad86-a24895eaa0f2@googlegroups.com> |
john <johnsefton288@gmail.com> tarded: >Michael >Have you timed any of those stars >for the 200 to 250 million years that >they give as the Cosmic Year? >Come on!! Have I personally timed the stars? No. Instead, I look up the works of others, and I see that spiral galaxies such as the Milky Way have a galaxy rotation curve where the star's velocity is a function of a star's distance from the center. Typically for stars close to the center the speed is proportional to the distance, almost solid body style rotation like a record o a record player, but stars not close to the center (such as our Sun) have an almost constant velocity, meaning that part of the galaxy does NOT rotate as a unit. A star twice as far out as a second star takes twice as long to go around the center once as the second star. The Galactic Year or Cosmic Year refers to one single star - our sun. Just like if we talk about a "year" it refers to how long it takes our Earth to go around the sun, not how long it takes Saturn to do so. >Different parts of a wave move at different speeds, >Michael- does the wave break up? >Come on!! >You're talking out of your butt The arms of a spiral galaxy are standing waves, not solid objects. Individual stars move in and out of the arms as they orbit, but they spend more time in the arms than out of them. This means the areas of the galaxy corresponding to the arms are brighter than between the arms, because of more stars per unit volume. Look at the animation at https://en.wikipedia.org/wiki/Galaxy_rotation_curve the right side galaxy. It is how real galaxies are observed to rotate. Notice how stars move into and out of the arms. In fact, the arms themselves don't rotate at all!
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Time Must Have a Universe Equation "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-06-18 16:33 -0700
Re: Time Must Have a Universe Equation trudi.schwander@gmail.com - 2016-06-19 03:22 -0700
Re: Time Must Have a Universe Equation john <johnsefton288@gmail.com> - 2016-06-19 12:15 -0700
Re: Time Must Have a Universe Equation moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-06-20 00:21 +0000
Re: Time Must Have a Universe Equation john <johnsefton288@gmail.com> - 2016-06-20 06:44 -0700
Re: Time Must Have a Universe Equation moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-06-20 19:30 +0000
Re: Time Must Have a Universe Equation john <johnsefton288@gmail.com> - 2016-06-20 16:24 -0700
Re: Time Must Have a Universe Equation moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-06-21 01:54 +0000
Re: Time Must Have a Universe Equation john <johnsefton288@gmail.com> - 2016-06-21 11:55 -0700
Re: Time Must Have a Universe Equation HVAC <mr.hvac@gmail.com> - 2016-06-21 12:35 -0700
Re: Time Must Have a Universe Equation moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-06-21 20:26 +0000
Re: Time Must Have a Universe Equation john <johnsefton288@gmail.com> - 2016-06-21 16:30 -0700
Re: Time Must Have a Universe Equation john <johnsefton288@gmail.com> - 2016-06-21 18:13 -0700
Re: Time Must Have a Universe Equation moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-06-22 15:43 +0000
Re: Time Must Have a Universe Equation john <johnsefton288@gmail.com> - 2016-06-22 10:33 -0700
Re: Time Must Have a Universe Equation moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-06-22 18:53 +0000
Re: Time Must Have a Universe Equation moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-06-22 15:29 +0000
Re: Time Must Have a Universe Equation "reber g=emc^2" <herbertglazier0@gmail.com> - 2016-06-21 12:49 -0700
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