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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 277 Walter Cruttenden 03-Sep-12 20:20
Re: The Celestial Clock 105 Dr. Lew Graham 03-Sep-12 21:51
Re: The Celestial Clock 106 Walter Cruttenden 03-Sep-12 23:33
no lost star, only knowledge.. 102 hendrik dirker 06-Sep-12 16:34
Re: no lost star, only knowledge.. 70 Walter Cruttenden 07-Sep-12 03:20
Re: no lost star, only knowledge.. 110 hendrik dirker 08-Sep-12 17:52
The solar system moves 74 Walter Cruttenden 09-Sep-12 00:20
Re: The solar system moves 104 hendrik dirker 09-Sep-12 15:43
Re: The solar system moves 53 Walter Cruttenden 10-Sep-12 07:15
It is what it is 80 hendrik dirker 11-Sep-12 23:00
Re: It is what it is 92 Walter Cruttenden 12-Sep-12 04:38
Re: The Celestial Clock 71 Corpuscles 03-Sep-12 22:52
Re: The Celestial Clock 71 Walter Cruttenden 03-Sep-12 23:57
Re: The Celestial Clock 73 carolb 04-Sep-12 02:24
Re: The Celestial Clock 40 Walter Cruttenden 04-Sep-12 19:22
Re: The Celestial Clock 86 Nolondil 05-Sep-12 23:41
Re: The Celestial Clock 39 Walter Cruttenden 07-Sep-12 20:56
Re: Yes, I get the occasional negative response 101 Thunderbird 04-Sep-12 03:08
Luna Capture 93 Dr. Lew Graham 04-Sep-12 04:00
Re: Luna Capture 72 Thunderbird 04-Sep-12 15:51
Mythology on Luna Capture 70 Dr. Lew Graham 05-Sep-12 04:09
Re: Luna Capture 133 Audrey 05-Sep-12 04:09
Re: Yes, I get the occasional negative response 53 Walter Cruttenden 04-Sep-12 19:25
Re: The Celestial Clock 79 Bibhu Dev Misra 04-Sep-12 08:42
Re: The Celestial Clock 74 Walter Cruttenden 04-Sep-12 19:39
Re: The Celestial Clock 77 Bibhu Dev Misra 05-Sep-12 08:25
Re: The Celestial Clock 85 Walter Cruttenden 05-Sep-12 19:59
Re: The Celestial Clock 49 Sirius7237 04-Sep-12 16:11
Re: The Celestial Clock 65 Walter Cruttenden 04-Sep-12 20:32
Re: The Celestial Clock, 54 michael seabrook 05-Sep-12 21:53
Re: The Celestial Clock, 78 Walter Cruttenden 06-Sep-12 06:54
Re: The Celestial Clock, 70 michael seabrook 06-Sep-12 21:00
The 'correct' time on the Celestial Clock, 75 Dr. Lew Graham 06-Sep-12 21:16
Re: The 'correct' time on the Celestial Clock, 91 carolb 06-Sep-12 22:49
Explain 21 December 2012 precisely? 71 Dr. Lew Graham 06-Sep-12 23:21
Re: The 'correct' time on the Celestial Clock, 73 michael seabrook 07-Sep-12 14:13
Re: The 'correct' time on the Celestial Clock, 52 Walter Cruttenden 07-Sep-12 21:24
Re: The 'correct' time on the Celestial Clock, 81 michael seabrook 08-Sep-12 12:21
Re: The 'correct' time on the Celestial Clock, 51 Walter Cruttenden 08-Sep-12 19:34
Re: The 'correct' time on the Celestial Clock, 81 Bibhu Dev Misra 09-Sep-12 07:37
Re: The 'correct' time on the Celestial Clock, 36 Walter Cruttenden 10-Sep-12 07:41
Re: The Celestial Clock 63 Bibhu Dev Misra 07-Sep-12 19:17
Re: The Celestial Clock 81 Walter Cruttenden 08-Sep-12 19:27
Queastion: Earth crust displacement 88 finaltom 30-Sep-12 02:52
Re: Queastion: Earth crust displacement 88 Walter Cruttenden 30-Sep-12 21:56
Re: Queastion: Earth crust displacement 65 finaltom 30-Sep-12 23:04


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