Re: Wikipedia Promoting Global Warming Hysteria?

Robert S <roberts218e@[EMAIL PROTECTED]
> wrote:
> >http://upload.wikimedia.org/wikipedia/commons/2/28/
>Sunspot_Numbers.png
>>
>> >...correlation of sunspot activity and irradiance:
>>
>> why do you believe numbers so far back...and why do you care
>
>There have been very accurate scientific astronomers going back to
>Tycho Brahe and before. Kepler couldn't have done what he did if this
>wasn't the case.

Tycho Brahe and Kepler weren't focused on sunspot activity (and I'm
not sure they even observed sunspots - Brahe died 10 years before
Galileo was systematically observing sunspots), and had no way to
measure irradiance.

The sunspot cycle was not discovered until the 1840s:
http://www-spof.gsfc.nasa.gov/Education/whschwab.html
and it was another decade before older observations were observed to
match the cycle, but even then systematic data was lacking before
1700, which was 70 years after Kepler died.

http://en.wikipedia.org/wiki/Sunspot
<The cyclic variation of the number of sunspots was first observed by
< Heinrich Schwabe between 1826 and 1843 and led Rudolf Wolf to make
< systematic observations starting in 1848. The Wolf number is an
< expression of individual spots and spot groupings, which has
< demonstrated success in its correlation to a number of solar
< observables. Also in 1848, Joseph Henry projected an image of the Sun
< onto a screen and determined that sunspots were cooler than the
< surrounding surface.[8]
<
<Wolf also studied the historical record in an attempt to establish a
< database on cyclic variations of the past. He established a cycle
< database to only 1700, although the technology and techniques for
< careful solar observations were first available in 1610.

lojbab
Bob LeChevalier - artificial linguist; genealogist
lojbab@[EMAIL PROTECTED]
   Lojban language www.lojban.org