Earth is slightly pear shaped.

This has no significant effects other than the orbits of satellites. It
doesn't cause any daily or seasonal changes which affect life on earth.

Earth wobbles on it's axis.

One wobble takes 26-thousand years. This too has no effect on the
seasons or climate. It just changes the direction that the earth's axis
points towards in space.

Earth is gradually slowing down, that is why we sometimes add one second
to the lenght of the year.

This is caused by the tidal (gravitational) interaction of the earth and
moon. The earth's rotation is slowing down and the moon is moving
farther away from the earth in it's orbit.

The solar system which Earth is in which is also in the Milky Way Galaxie
is moving through Space at about 60,000 miles per hour.

It's all relative. The earth is moving (rotating) at 1000-miles per hour
at the equator. The earth revolves at about 66,000-mph in it's orbit
around the sun. The solar system is revolving around the center of the
galaxy at about 550,000-mph. Our Milky Way galaxy is moving through
space at millions of miles per hour relative to most other galaxies but
we are actually approaching the Andromeda galaxy, which is currently
about 2-million light years away. (11,600,000-trillion miles) It will
still take about 3-billion years before the big collison.

http://tinyurl.com/2zlp44

Earth is closer to the Sun in Winter and further away from the Sun
in Summer.

This is true only for the northern hemisphere and it's not what causes
the seasons.

HFguy wrote:

Earth is closer to the Sun in Winter and further away from the Sun
in Summer.

This is true only for the northern hemisphere and it's not what causes
the seasons.


The tilt of the axis causes seasons, but your distance theories are out
to lunch.

============================================
The difference between the distances on 4 January and 4 July is about 3
percent, which corresponds to about 5 million km or 3 million mi.

http://www.astro.uu.nl/~strous/AA/en...en/zon.html#11
=============================================




mike

"HFguy" wrote in message
news:uv1hi.10571$9b5.1632@trndny05...
Earth is closer to the Sun in Winter and further away from the Sun
in Summer.

This is true only for the northern hemisphere and it's not what causes the
seasons.


The Earth reaches perihelion - the point in its orbit closest to the Sun -
in early January, only about two weeks after the December solstice. Thus
winter begins in the northern hemisphere at about the time that the Earth is
nearest the Sun. Is this important? Is there a reason why the times of
solstice and perihelion are so close? It turns out that the proximity of the
two dates is a coincidence of the particular century we live in. The date of
perihelion does not remain fixed, but, over very long periods of time,
slowly regresses (moves later) within the year. There is some evidence that
this long-term change in the date of perihelion influences the Earth's
climate.

"Brenda Ann" wrote in message
news

"HFguy" wrote in message
news:uv1hi.10571$9b5.1632@trndny05...
Earth is closer to the Sun in Winter and further away from the Sun
in Summer.

This is true only for the northern hemisphere and it's not what causes
the seasons.


The Earth reaches perihelion - the point in its orbit closest to the Sun -
in early January, only about two weeks after the December solstice. Thus
winter begins in the northern hemisphere at about the time that the Earth
is nearest the Sun. Is this important? Is there a reason why the times of
solstice and perihelion are so close? It turns out that the proximity of
the two dates is a coincidence of the particular century we live in. The
date of perihelion does not remain fixed, but, over very long periods of
time, slowly regresses (moves later) within the year. There is some
evidence that this long-term change in the date of perihelion influences
the Earth's climate.



My bad, forgot the link/cite:

http://aa.usno.navy.mil/faq/docs/seasons_orbit.html

On Jun 28, 9:23 pm, HFguy wrote:
bpnjensen wrote:

On the first point - yes, the magic 100% probably will not be reached
on black holes - but 75% and climbing may be good enough for most of
us forever :-)

The first unfortunate traveler to fall into a black hole will have the
magic 100% but it's unlikely we'll be hearing from him.

Indeed - but we can watch his voyage of discovery for an immense
period of time ;-)

It was my keyboard that said Earth spins around at 24,000 miles per
hour.Actually it is 1,000 miles per hour.Earth's circumference at the
equator is about 24,000 miles, so 1,000 miles per hour equals one 24
hour day.
I am going to fire my keyboard and get another one.
cuhulin

HFguy wrote:

That's called the orbital forcing theory of climate change.

http://en.wikipedia.org/wiki/Orbital_forcing


What about the Al Gore School of Kookology theory regarding climate change?

By the time he's likely proven to be correct, most of his detractors
won't be around any more. This will spare them the embarrassment of
trying to explain why they just didn't get it. However the descendants
of those naysayers will still talk about the days when their crazy uncle
so and so used to rant about Al Gore.

Al Gore is mentally ill.

Some of Earth's global warming is caused by that very berry magma which
makes volcanos.Untill people start moving to and living on other Planets
we are stuck here on Mother Earth.The Earth warms up, the Earth cools
down, has been doing so for millions, perhaps billions of years and
there is nothing we can do to stop that.It ain't gonna happen.
cuhulin

HFguy wrote:

Not sure who's distance theories you're referring to but I was replying
to the first poster's quote (above) about the distance of the sun from
the earth during the (northern) summer and winter, which as you
acknowledge, has nothing to do with the cause of the seasons.

I misunderstood the statement that "It only applies to the Northern
Hemisphere". The brain kept telling me that the whole planet is closer
to the Sun in winter, not just the Northern half. The distance the
planet is closer is far greater than the amount given by the precession.

My fault..please accept my humble apologies.

In fact
the southern summer and winter tend to be more extreme because the earth
happens to be closest and farthest from the sun respectively, during
those seasons in the southern hemisphere. We happen to live in an era
where this is the case. As the earth's axis precesses over a period of
26-thousand years, the seasons of the year when perihelion and aphelion
occur in each hemisphere slowly shifts. In about 13-thousand years from
now the situation will be reversed for each hemisphere.

I'll have to verify that...must leave note...Where is my acid free
papyrus.....





mike

In article L7rhi.182$105.176@trndny08, HFguy
wrote:

Brenda Ann wrote:

"HFguy" wrote in message
news:uv1hi.10571$9b5.1632@trndny05...

Earth is closer to the Sun in Winter and further away from the Sun

in Summer.

This is true only for the northern hemisphere and it's not what causes the
seasons.



The Earth reaches perihelion - the point in its orbit closest to the Sun -
in early January, only about two weeks after the December solstice. Thus
winter begins in the northern hemisphere at about the time that the Earth
is
nearest the Sun. Is this important? Is there a reason why the times of
solstice and perihelion are so close? It turns out that the proximity of
the
two dates is a coincidence of the particular century we live in. The date
of
perihelion does not remain fixed, but, over very long periods of time,
slowly regresses (moves later) within the year. There is some evidence that
this long-term change in the date of perihelion influences the Earth's
climate.

That's called the orbital forcing theory of climate change.

http://en.wikipedia.org/wiki/Orbital_forcing

The only question left is when will we reach the aphelion of the
hyperbole regarding global warming.

--
Telamon
Ventura, California