Re: Two dumb questions


<geraldkelleher@xxxxxxxxxxx> wrote in message
news:1121268974.864719.127800@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
>
> George Dishman wrote:
>> "Llanzlan Klazmon" <Klazmon@xxxxxxxxxxxxxxxx> wrote in message
>> news:Xns96927DF88E187Klazmonllurdiaxorbgo@xxxxxxxxxxxxxx
>> > "George Dishman" <george@xxxxxxxxxxxxxxxxx> wrote in
>> > news:db1hsi$7q1$1@xxxxxxxxxxxxxxxxxxxxx:
>> >
>> >> Jonathan, I read your response but I think you
>> >> credit Gerald with too much understanding.
>> >>
>> >> <geraldkelleher@xxxxxxxxxxx> wrote in message
>> >> news:1121171698.902870.140370@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> >>> To Jonathan
>> >> ...
>> >>> That shadow/light division changes in accordance with Kepler's second
>> >>> law (see first diagram) thereby generating the Equation of Time
>> >>> differential between the natural day and the 24 hour clock day and
>> >>> more importantly seasonal variations from a global perspective
>> >>> rather than the pathetic winter/summer hemispherical descriptions.
>> >>
>> >> Read that again: "seasonal variations from a global
>> >> perspective rather than the pathetic winter/summer
>> >> hemispherical descriptions."
>> >>
>> >> AFAICS, Gerald is saying that if it is summer in
>> >> the UK (as it is now, I know, I'm here), it is
>> >> also summer in Australia and the widely held
>> >> belief that they are six months out of phase is
>> >> erroneous! Maybe one of our antipodean contributors
>> >> could perform a scientific experiment and pop his
>> >> head out of the window to check for us :-)
>> >
>> > Just carried out your experiment. Definitely winter here and I'm not
>> > too
>> > far from Australia. Looks like Gerald's hypothesis is empirically
>> > disproved. Well who'da thought?
>>
>> Marvellous, thank you Llanzlan. Can you
>> explain those two observations Gerald?
>
> Most people have enough common sense to realise that the Earth axial
> orientation is constantly pointed towards Polaris therefore the Equator
> at 90 degrees to the axis will also remain fixed.

True, many people know that the axis of the Earth's
_rotation_ currently passes close to Polaris:

http://www.astro.uiuc.edu/~kaler/sow/umi-t.html

Probably somewhat fewer also know that the axis of
the Earth's _orbit_ passes close to Nu Draconis:

http://www.astro.uiuc.edu/~kaler/sow/dra-t.html

Guess what the angle between them is.


> The cause in seasonal changes from a global perspective is the change
> in orbital orientation of the Earth to this fixed axial orientation and
> it has nothing to do with any perceived tilt of the axis to the orbital
> plane or to the Sun.

If the seasons depended only on the orbital motion
then when the Earth was at perihelion it would be
summer in both the UK and Australia but as you have
just been told, it is currently summer in the UK but
winter in Australia. What you are trying to tell me
is therefore unquestionably wrong no matter how
arrogantly you state that opinion.


> The politicians and most everyone else have noticed a climatic
> imbalance or climate change as it is currently called,these same people
> are faced with scientists who cannot even determine what causes the
> natural seasonal variations for anyone who finds reason to argue with
> me cannot consider themselves to be scientific in any way.

The scientific method requires our views to be drawn
from observation of reality, and the observation, as
you have now discovered, is that the seasons do NOT
coincide between the hemispheres. It is precisely
because my arguments are based purely on science
that you cannot refute them, and you never will until
you can explain why summer in the northern hemisphere
is OBSERVED to coincide with winter in the southern
hemisphere.

George


.

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