Re: [Phys-l] day -> month -> year

[Bernard Cleyet <bernardcleyet@redshift.com>]

On 2011, Dec 05, , at 04:38, John Denker wrote:

> Long before the day becomes equal to the year, it would
> become equal to the lunar month.  That is, the earth 
> would always turn one fact to the moon, just as the moon 
> always turns one face to the earth.
>
>  I say "would" rather than "will" because the process
>  is very slow;  the sun is expected to turn into a red
>  giant and engulf the earth and moon before the process
>  runs to completion.
>  http://www.astro.uu.nl/~strous/AA/en/antwoorden/getijden.html
>
>       The day becoming equal to the year would take
>       even longer;  far, far longer.


Silly me, and I've read, for horological reasons, the approximate effects of the moon/solar tides. (about double).


bc remembers a talk, to the local amateur radio club, about the effect the receding moon, etc. will have on the Santa Barbara grunion run.

-------------------------------

Spawning

The spawning season extends from late February or early March to August or early September, varying slightly in length from year to year. Actual spawning runs are restricted to relatively few hours during this period. Grunion spawn only on 3 or 4 nights after the highest tide associated with each full or new moon and then only for a 1 to 3 hour period each night following high tide.


http://www.dfg.ca.gov/marine/grunion.asp