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On Sunday, September 23, 2012 12:49:01 AM UTC-7, Paul Schlyter wrote:
On Sat, 22 Sep 2012 11:30:50 -0700 (PDT), palsing wrote: OK, I could have said "all day, every day"... and I also could have specified "nearly at Polaris"... Which wouldn't be true. In some 12 000 years, the Eart's axis will point near Vega instead, for example. Well, if you had actually read my post carefully, I did say that "right now the Earth's axis points continuously at Polaris,", implying that the pole location changes with time... |
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On Sep 23, 8:53*pm, palsing wrote:
On Sunday, September 23, 2012 12:49:01 AM UTC-7, Paul Schlyter wrote: On Sat, 22 Sep 2012 11:30:50 -0700 (PDT), palsing wrote: OK, I could have said "all day, every day"... and I also could have specified "nearly at Polaris"... Which wouldn't be true. In some 12 000 years, the Eart's axis will point near Vega instead, for example. Well, if you had actually read my post carefully, I did say that "right now the Earth's axis points continuously at Polaris,", implying that the pole location changes with time... The only star either of you have to consider is the central star around which the polar coordinates turn in a circle just as the polar coordinates and the Equatorial rings of Uranus are seen to do and the rings of Uranus will turn a full 360 degrees over an 84 year orbital period as seen from Earth despite a foolish belief that the Earth's orbital motion influences the observations. An able astronomer would interpret the turning of the polar coordinates to the central Sun as being carried around in a circle by the orbital behavior of the Earth rather than any 'tilting' action it has hence axial precession as it is presently understood is a hindrance to this vital astronomical modification. Like the Earth,Uranus polar coordinates keep the same orientation throughout an orbital period - http://www.lcsd.gov.hk/CE/Museum/Spa...anus_orbit.jpg It is when the actual orbital motion is scrutinized locally,that observers see that the dynamic for the annual polar precession to the central Sun is a consequence of the orbital behavior of Uranus and a separate ecliptic axis around which the polar coordinates and the rings turn East to West to the central Sun- http://www.daviddarling.info/images/...gs_changes.jpg Astronomers indeed !,you need confidence and intelligence to work out the few details and apply them to the Earth rather than homocentrist welfare recipients who are too dull to pick up the new approach using modern imaging. |
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On Sep 23, 7:47*am, "G=EMC^2" wrote:
On Sep 23, 3:12*am, oriel36 wrote: On Sep 22, 8:02*pm, Dr J R Stockton wrote: In sci.astro.amateur message , Thu, 20 Sep 2012 22:11:43, Davoud posted: I don't have time to do the searching at the moment, but I have to think that ancient natural philosophers, whether in Greece or Persia or China or parts unknown, knew the extent of the Earth's axial tilt. http://en.wikipedia.org/wiki/Earth%27s_Axis#History. I look at how they mangle the straightforward reasoning which connects planetary shape with the motion and evolution of the surface crust long after I proposed differential rotation as the key mechanism for these planetary features.The uneven rotational gradient of the fluid interior requires dropping the idea of the Earth as a celestial gyroscope *and picking up observations of celestial objects with exposed rotating fluid compositions which display differential rotation. The polar coordinates don't act like a gyroscope nor 'tilt' towards and away from the Sun but rather are carried around in a circle to the central Sun by the separate orbital motion of the Earth,this leaves the researcher free to work with daily rotation and the fluid interior rather than being too concerned about a fixed axis - horses for courses in other words. For an era so concerned with climate,it is amazing that they can't describe the Earth's climate in planetary terms,in our planet's case,it is largely equatorial as opposed to the polar climate of Uranus by based on the angular distance between the the daily rotational axis and the ecliptic axis.The Wiki article is more of the same - "The Earth's axis remains tilted in the same direction with reference to the background stars throughout a year (throughout its entire orbit). This means that one pole (and the associated hemisphere of the Earth) will be directed away from the Sun at one side of the orbit, and half an orbit later (half a year later) this pole will be directed towards the Sun. This is the cause of the Earth's seasons." http://en.wikipedia.org/wiki/Earth%27s_Axis#History The cause of daylight/darkness asymmetries with greater fluctuations towards the polar coordinates is due to the changing relationship of rotational orientation of the planet to the circle of illumination.It is so clearly demonstrated by the images of Uranus as the hemispheres experience extreme fluctuations in daylight/darkness across large areas *of the planet that a thinking person can't but see that the old idea of axial precession is an obstacle to recognizing the changing orientation of the rotational axis to the central Sun. I see these awkward 'tilted' explanations when it takes only a simple imitation analogy to introduce another axis around which the polar coordinates turn to the central Sun, a broom handle representing axial 'tilt' and the line of the body walking/orbiting a central object representing an ecliptic axis goes a long way to accounting for the observations of Uranus as the broom handle remains fixed to an external point at all times as a person walks/orbits the object yet the tilt of the broom will change to the central object/Sun as it moves in a circle. I wish somebody else would raise themselves to a higher standard,after all,when you have all these guys running around announcing that the sky is falling with climate,the same people have yet to replace the old 'no tilt/no seasons' ideology with the new approach where a planet falls between an equatorial and polar climate due to its inclination. -- *(c) John Stockton, nr London, UK. *Mail via homepage. *Turnpike v6.05 *MIME. * Web *http://www.merlyn.demon.co.uk/ - FAQqish topics, acronyms and links; * Astro stuff via astron-1.htm, gravity0.htm ; quotings.htm, pascal..htm, etc. *No Encoding. Quotes before replies. Snip well. Write clearly. Don't Mail News.- Hide quoted text - - Show quoted text - Moon keeps tilt from wobbling.and with wobbling there would be no humankind. *TeBet It wobbles just a little. |
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On 9/23/2012 6:56 PM, GogoJF wrote:
Moon keeps tilt from wobbling.and with wobbling there would be no humankind. TeBet It wobbles just a little. It's a Weeble? -- "OK you ****s, let's see what you can do now" -Hit Girl http://www.youtube.com/watch?v=CjO7kBqTFqo .. 变亮 |
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On Sep 23, 6:12*pm, HVAC wrote:
On 9/23/2012 6:56 PM, GogoJF wrote: Moon keeps tilt from wobbling.and with wobbling there would be no humankind. *TeBet It wobbles just a little. It's a Weeble? -- "OK you ****s, let's see what you can do now" -Hit Girlhttp://www.youtube..com/watch?v=CjO7kBqTFqo.. 变亮 Ha! There is no doubt in my mind that without the moon, there would be no life on Earth. |
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On Sunday, September 23, 2012 12:15:50 PM UTC-7, Dr J R Stockton wrote:
Also, the Earth's axis does not point at Polaris, and is not likely to do so within the lifetime of any of us. It does point continuously at a slowly-moving point currently near Polaris, though. A little inaccuracy saves a world of explanation. - C. E. Ayres |
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On 9/23/2012 8:05 PM, GogoJF wrote:
Moon keeps tilt from wobbling.and with wobbling there would be no humankind. TeBet It wobbles just a little. It's a Weeble? - Ha! There is no doubt in my mind that without the moon, there would be no life on Earth. Yet one more reason that the chance of life is vanishingly small in the galaxy. We of the Earth are incredibly, extraordinarily lucky. -- "OK you ****s, let's see what you can do now" -Hit Girl http://www.youtube.com/watch?v=CjO7kBqTFqo .. 变亮 |
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On Sep 23, 7:40*pm, HVAC wrote:
On 9/23/2012 8:05 PM, GogoJF wrote: Moon keeps tilt from wobbling.and with wobbling there would be no humankind. *TeBet It wobbles just a little. It's a Weeble? - Ha! *There is no doubt in my mind that without the moon, there would be no life on Earth. Yet one more reason that the chance of life is vanishingly small in the galaxy. *We of the Earth are incredibly, extraordinarily lucky. -- "OK you ****s, let's see what you can do now" -Hit Girlhttp://www.youtube..com/watch?v=CjO7kBqTFqo.. 变亮 I would theorize that every star with its' hypothetical, yet for certain revolving planets might one day produce a planet which is capable, or had been capable of producing life. That's what I would like to believe. |
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On Sep 23, 8:15*pm, GogoJF wrote:
On Sep 23, 7:40*pm, HVAC wrote: On 9/23/2012 8:05 PM, GogoJF wrote: Moon keeps tilt from wobbling.and with wobbling there would be no humankind. *TeBet It wobbles just a little. It's a Weeble? - Ha! *There is no doubt in my mind that without the moon, there would be no life on Earth. Yet one more reason that the chance of life is vanishingly small in the galaxy. *We of the Earth are incredibly, extraordinarily lucky. -- "OK you ****s, let's see what you can do now" -Hit Girlhttp://www.youtube.com/watch?v=CjO7kBqTFqo.. 变亮 I would theorize that every star with its' hypothetical, yet for certain revolving planets might one day produce a planet which is capable, or had been capable of producing life. *That's what I would like to believe. You like to think that every solar system tries to find a way to produce life. It's just a natural process. |
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On Sep 23, 7:40*pm, HVAC wrote:
On 9/23/2012 8:05 PM, GogoJF wrote: Moon keeps tilt from wobbling.and with wobbling there would be no humankind. *TeBet It wobbles just a little. It's a Weeble? - Ha! *There is no doubt in my mind that without the moon, there would be no life on Earth. Yet one more reason that the chance of life is vanishingly small in the galaxy. *We of the Earth are incredibly, extraordinarily lucky. -- "OK you ****s, let's see what you can do now" -Hit Girlhttp://www.youtube..com/watch?v=CjO7kBqTFqo.. 变亮 I think we are extremely lucky because we have captured such a large satellite as our moon, lie in the distance where the sun may produce the right temperature and life. The odds go on and on. We have definitely won the lottery when it comes to our organism. |
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