--- In [email protected], doctor_gabby_savy <[EMAIL PROTECTED]> wrote: > > --- In [email protected], Peter <[EMAIL PROTECTED]> wrote: > > > > The precession of the earth's axis causes the cardinal > > directions to slowly shift about 1 degree every 72 > > years. In moves in a circle with an arc of approx 24 > > degrees completing one cycle every 26,000 years. > > This > > means that if you establish "true" north, 13,000 years > > later it will be off by 24 degrees. Oh no! time to > > rotate the house! > > 13000 / 72 = 24????????? > Is that the "new" math? > > I get 180 degrees. Which makes sense since that is half a circle > --which corresponds to 13,000/26,000 -- half a precessional cycle. > > I need to better "visualize" what happens with precession.
It's like a top wobbling as its spin slows down. Picture a dinner plate, with the top moving around the outer edge of the plate, spinning as it goes, but also wobbling slowly. The axis of the top describes a small circle. The sun is at the center of the plate. The plane of the circle the top's axis is describing is roughly parallel to the plane of the plate. (Please excuse if this is a duplicate. Yahoo burped as I was trying to post it the first time.) ------------------------ Yahoo! Groups Sponsor --------------------~--> Join modern day disciples reach the disfigured and poor with hope and healing http://us.click.yahoo.com/lMct6A/Vp3LAA/i1hLAA/UlWolB/TM --------------------------------------------------------------------~-> To subscribe, send a message to: [EMAIL PROTECTED] Or go to: http://groups.yahoo.com/group/FairfieldLife/ and click 'Join This Group!' Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/FairfieldLife/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
