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Hi Carol - Good questions.

1.Sirius is a possibility for a myriad of reasons but you are right it is a bit far to imagine we could orbit the center of mass (roughly 6.6ly) in ~24,000 years. Nonetheless, some suggest it is possible, including astrophysicist Reg Cahill of Australia who calculates the solar system is moving ~430km/s, almost the exact speed required. But he measures relative to the CMB and it is uncertain if this is the right methodology. Some also argue that parallax measurements might need adjustment by a factor of 2 to 4x but I have not studied this enough to comment. With current precession theory effectively constraining solar system motion to zero it may take awhile before these issues are seriously examined. Yes, Alpha Centauri appears to be closer but it is much farther off plane, whereas Sirius is closer to our plane and closer to the Pluto and Sedna inclines. It is interesting to note that Barnard's Star lies in the opposite direction, roughly in line, and it has the highest proper motion of any nearby star. Your questions about perturbations are difficult to answer until we know what is going on. Heck, no one is even certain what keeps Sedna in its current position - and that is much closer than anything we are now discussing.

2. I am skeptical of the brown dwarf scenario for exactly that reason (although it could be against the galactic center background where there is a lot of noise), but there are some very good scientists, including Mike Brown at Caltech, that are seriously looking for such an object, partially because Sedna demands the presence of another massive object.

3. It is hard to prove a negative (such as x object does NOT exist) but lunisolar theory has much bigger problems. Certainly there are some local effects like nutation but the bulk of what we call the lunisolar effect (sun moving across sky at about 50.3"p/y) is probably just a reference frame issue, and this is why there appears to be so little precession relative to local objects and so much relative to distant objects (outside the moving solar system).



“Truly the greatest gift you can give is that of your own self-transformation.”
Chinese Philosopher – Lao Tzu

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Subject Views Written By Posted
The Celestial Clock 394 Walter Cruttenden 03-Sep-12 20:20
Re: The Celestial Clock 181 Dr. Lew Graham 03-Sep-12 21:51
Re: The Celestial Clock 175 Walter Cruttenden 03-Sep-12 23:33
no lost star, only knowledge.. 172 hendrik dirker 06-Sep-12 16:34
Re: no lost star, only knowledge.. 123 Walter Cruttenden 07-Sep-12 03:20
Re: no lost star, only knowledge.. 175 hendrik dirker 08-Sep-12 17:52
The solar system moves 140 Walter Cruttenden 09-Sep-12 00:20
Re: The solar system moves 177 hendrik dirker 09-Sep-12 15:43
Re: The solar system moves 117 Walter Cruttenden 10-Sep-12 07:15
It is what it is 121 hendrik dirker 11-Sep-12 23:00
Re: It is what it is 167 Walter Cruttenden 12-Sep-12 04:38
Re: The Celestial Clock 118 Corpuscles 03-Sep-12 22:52
Re: The Celestial Clock 137 Walter Cruttenden 03-Sep-12 23:57
Re: The Celestial Clock 126 carolb 04-Sep-12 02:24
Re: The Celestial Clock 84 Walter Cruttenden 04-Sep-12 19:22
Re: The Celestial Clock 158 Nolondil 05-Sep-12 23:41
Re: The Celestial Clock 87 Walter Cruttenden 07-Sep-12 20:56
Re: Yes, I get the occasional negative response 171 Thunderbird 04-Sep-12 03:08
Luna Capture 168 Dr. Lew Graham 04-Sep-12 04:00
Re: Luna Capture 142 Thunderbird 04-Sep-12 15:51
Mythology on Luna Capture 132 Dr. Lew Graham 05-Sep-12 04:09
Re: Luna Capture 210 Audrey 05-Sep-12 04:09
Re: Yes, I get the occasional negative response 112 Walter Cruttenden 04-Sep-12 19:25
Re: The Celestial Clock 161 Bibhu Dev Misra 04-Sep-12 08:42
Re: The Celestial Clock 151 Walter Cruttenden 04-Sep-12 19:39
Re: The Celestial Clock 174 Bibhu Dev Misra 05-Sep-12 08:25
Re: The Celestial Clock 165 Walter Cruttenden 05-Sep-12 19:59
Re: The Celestial Clock 99 Sirius7237 04-Sep-12 16:11
Re: The Celestial Clock 108 Walter Cruttenden 04-Sep-12 20:32
Re: The Celestial Clock, 113 michael seabrook 05-Sep-12 21:53
Re: The Celestial Clock, 131 Walter Cruttenden 06-Sep-12 06:54
Re: The Celestial Clock, 132 michael seabrook 06-Sep-12 21:00
The 'correct' time on the Celestial Clock, 156 Dr. Lew Graham 06-Sep-12 21:16
Re: The 'correct' time on the Celestial Clock, 166 carolb 06-Sep-12 22:49
Explain 21 December 2012 precisely? 152 Dr. Lew Graham 06-Sep-12 23:21
Re: The 'correct' time on the Celestial Clock, 147 michael seabrook 07-Sep-12 14:13
Re: The 'correct' time on the Celestial Clock, 119 Walter Cruttenden 07-Sep-12 21:24
Re: The 'correct' time on the Celestial Clock, 136 michael seabrook 08-Sep-12 12:21
Re: The 'correct' time on the Celestial Clock, 98 Walter Cruttenden 08-Sep-12 19:34
Re: The 'correct' time on the Celestial Clock, 152 Bibhu Dev Misra 09-Sep-12 07:37
Re: The 'correct' time on the Celestial Clock, 86 Walter Cruttenden 10-Sep-12 07:41
Re: The Celestial Clock 133 Bibhu Dev Misra 07-Sep-12 19:17
Re: The Celestial Clock 144 Walter Cruttenden 08-Sep-12 19:27
Queastion: Earth crust displacement 156 finaltom 30-Sep-12 02:52
Re: Queastion: Earth crust displacement 162 Walter Cruttenden 30-Sep-12 21:56
Re: Queastion: Earth crust displacement 114 finaltom 30-Sep-12 23:04


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