Stellar Oscillations across Spiral Arms

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by tvanflandern</i>
<br />To improve the mental picture I was trying to draw, let's exaggerate it. <hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Now you're getting into large perturbations; that's a whole new ball game, and it will not help to clarify your assertions re. small perturbations. Let's just accept that neither of us really knows how to generalize the 3-body problem in a practical way.

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">...I recommend that you get an orbit integrator.... <hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">If there's a price tag on it, I'm probably not interested. The only on-line " orbital integrator " that I have found is for calculating declination, distance, altitude and azimuth of a planet as seen from a given place and time on Earth.

I did find some interesting papers on the 3-body problem, such as
<i>The Keplerian map for the restricted three-body problem as a model of comet evolution</i> . It might take me a few months to digest this 24-page treatise---if I can stay focused that long. More likely, I'll turn my attention to something like mating rituals of nocturnal birds, or perhaps I'll take up martial arts or knitting sweaters. If that happens, look for me in another year or two.

Maybe it's time to end this tangent discussion about cometary capture and get back to the so-called oscillations of our galactic spiral arm. What do you make of my interpretation of that postulate---which I posted above on 21 Jul 2005 : 01:44:51?

It seems to me the two details are interconnected because the comet capture is proof of movement of the sun in the arm. Action-reaction. There are other ways to view it though.

I have found some websites that provide insight into what we're talking about here.
An atlas of the universe
Celestia
Discuss an alternate theory at Astronomy.com

[EDITED 05/07/27 02:30 UT: I beg your pardon, anyone who clicked my link for the Atlas of the Universe---before I made it right. I inadvertently omitted the latter portion of the URL. When I later clicked on it, to my surprise, I got the homepage of the LDPS Church, which I never heard of 'til now. It appears to be associated with the Libertarian Party, which I happen to claim as my political affiliation for the last dozen or so years. Sorry if I offended anyone; I really don't want to be branded as another of the many religious nuts that seem drawn to the site. END OF EDIT]

[EDITED 05/07/27 02:50 UT: I downloaded and installed Celestia's virtual universe software. When I try to run it, I get a "invalid page fault" message and the program closes. It does not, however, crash my computer. I'm running Win98; maybe you'll have better luck with your system. END OF EDIT]

[EDITED 05/07/27 03:00 UT: Sorry, Tom; I didn't meant to relocate your forum to Astronomy.com. After quickly scanning the "alternate theory at Astronomy.com", think it says basically that our Sun is not tied to any one spiral arm, but instead races ahead at a relative speed of about 20km/sec. Mass extinctions coincide with times when the Sun passed thru the various galactic arms. Oh! by the way, we better all make plans to go underground in approximately 1.36 million years.END OF EDIT]

PhilJ wrote - 21 Jul 2005 : 01:44:51

". . . Johnson speaks of "oscillations in both directions", which some posters have found to be unclear. I think he might mean both radial and axial directions, relative to the galaxy. In otherwords, stars near the center of the spiral arm simply follow an oval path . . ."

I don't think it's unclear what Johnston means, he means radial in, radial out across the spiral arm. This is obvious in his animation. It is also implicit in his discussions of how the oscillations are produced by the spiral arm's gravity, and how velocity oppositions leads to extremely energetic impacts.

Peter Nielsen

Email: uusi@hotkey.net.au
Post: 12 View St, Sandy Bay 7005, Australia

What I really meant was that Johnston's <font color="yellow">stellar oscillations go back and forth <b>across</b> well-defined spiral arms </font id="yellow">unsynchronously, so that sometimes there are extremely energetic head-on impacts, consistent with my S1, S2 defined at

metaresearch.org/msgboard/topic.asp?TOPIC_ID=692

Peter Nielsen

Email: uusi@hotkey.net.au
Post: 12 View St, Sandy Bay 7005, Australia

<b>Important Corroborations:</b>
The asynchronicity of those "stellar oscillations [going up and down,] back and forth [and so on] across well-defined spiral arms" explains the ubiquity of "head-on" and other extremely energetic <font color="yellow">S1, S2 collisions evident as Planetary Meta-Geology, planetary and other scale symmetries, other surface delineational "inscription" phenomena of rocky planets, planetisemals</font id="yellow">, described at www.nodrift.com (more or less starting at the homepage and w.1a.pps), consistent with TVF¡¯s eph and so on.

C. Johnston has explained how stars, comets and so on are oscillating out of phase across galaxy spiral arms. This produces a high frequency of S1, S2 collisions between these massive objects, consistent with that ubiquitous evidence and explanation, corroborative of my Planetary Meta-Geology, TVF¡¯s eph and so on.