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Great you told us where it is and that it is static.
Is that static, on a man made globe, or where the Suns northern and southern limits of travel @ the 23º tilt.
The reason Earth's axis is 23.5° from the orbital plane is most likely because it got smacked by Thea ~4.2 billion years ago (which created the moon). Thea was a another planet roughly the size of Mars.
It would require something almost as large as Thea to significantly alter the rotational axis of Earth. As I said, as long as Earth's axial tilt remains 23.5° from the orbital plane, the tropics and the arctic/antarctic will remain static. If the axial tilt changes, then so will the tropics and the arctic/antarctic.
Quote:
Originally Posted by BentBow
Why was Antarctica tropical at one time and the Sahara desert green and full of life.
Climate Change.
That was before the current ice-age, when the Earth had a mean surface temperature of 22°C ± 1°C. Currently, the mean surface temperature of Earth is 14.8°C.
We have been experiencing an ice-age for the last 2.58 million years. All ice-ages have very long periods of glaciation, and brief interglacial periods. We happen to be approaching the end of one of those interglacial periods known as the Holocene Interglacial Period, which began 15,000 years ago.
Quote:
Originally Posted by BentBow
Use a big magnet, and call it the sun. Use a little magnet and call it earth. Get them close enough together so that the bigger magnet effects the smaller magnet.
Will the smaller magnet align on an axis with the magnetic poles of the larger magnet?
If the magnetic poles are moving, that would make it dynamic, not static.
The only way magnetism from the sun effects Earth is through solar flares and CMEs. When magnetic field lines twist they build up power, the more they twist and contort, the more power they have. Occasionally those magnetic field lines will break away and fling billions of tons of charged particles toward Earth. That is the only way the sun's magnetic field effects Earth.
Otherwise, neither the sun nor the Earth have any magnetic influence on the other. Earth's magnetic poles are determined by the rotation of its molten nickel/iron core, not the sun.
The reason Earth's axis is 23.5° from the orbital plane is most likely because it got smacked by Thea ~4.2 billion years ago (which created the moon). Thea was a another planet roughly the size of Mars.
It would require something almost as large as Thea to significantly alter the rotational axis of Earth. As I said, as long as Earth's axial tilt remains 23.5° from the orbital plane, the tropics and the arctic/antarctic will remain static. If the axial tilt changes, then so will the tropics and the arctic/antarctic.
That was before the current ice-age, when the Earth had a mean surface temperature of 22°C ± 1°C. Currently, the mean surface temperature of Earth is 14.8°C.
We have been experiencing an ice-age for the last 2.58 million years. All ice-ages have very long periods of glaciation, and brief interglacial periods. We happen to be approaching the end of one of those interglacial periods known as the Holocene Interglacial Period, which began 15,000 years ago.
The only way magnetism from the sun effects Earth is through solar flares and CMEs. When magnetic field lines twist they build up power, the more they twist and contort, the more power they have. Occasionally those magnetic field lines will break away and fling billions of tons of charged particles toward Earth. That is the only way the sun's magnetic field effects Earth.
Otherwise, neither the sun nor the Earth have any magnetic influence on the other.
Are you assuming the earth rotates around the suns equator.
Are you assuming the earth rotates around the suns equator.
On magnets, opposite poles attract.
No, I am not. Because I already know that the Earth orbits 7.155° off from the sun's equator. Earth's orbit is also not perfectly circular, but rather has an eccentricity of 0.016.
No, I am not. Because I already know that the Earth orbits 7.155° off from the sun's equator. Earth's orbit is also not perfectly circular, but rather has an eccentricity of 0.016.
So, now we have two numbers to use in the calculation to understand why the earth goes around the sun in a tilted degree and the opposing magnetic poles effects.
The "wobble" is even another factor making it dynamic and not static.
So, now we have two numbers to use in the calculation to understand why the earth goes around the sun in a tilted degree and the opposing magnetic poles effects.
The "wobble" is even another factor making it dynamic and not static.
The Earth orbits the sun because it is traveling 67,108 mph and it is 92,955,807.5 miles away from the sun. Considering the mass of the two objects, the Earth has no choice but to orbit the sun. If the Earth moved any faster or slower, then it would not remain 92,955,807.5 miles away from the sun. The closer a planet is to the sun, the faster it must move in order to stay in orbit. The further away a planet is to the sun, the slower it must move to stay in orbit.
Now, thats impressive One things for sure we all live on a moving planet: Icebergs, Volcanos, Plate Techtonics, Rain, Hurricanes, Title waves, and Sharknados. How are we possibly able to survive
The Earth orbits the sun because it is traveling 67,108 mph and it is 92,955,807.5 miles away from the sun. Considering the mass of the two objects, the Earth has no choice but to orbit the sun. If the Earth moved any faster or slower, then it would not remain 92,955,807.5 miles away from the sun. The closer a planet is to the sun, the faster it must move in order to stay in orbit. The further away a planet is to the sun, the slower it must move to stay in orbit.
That is basic Newtonian mechanics.
It doesn't remain that far now.
Earth's orbit around the sun is an ellipse and not a circle
Another way to look at it, if put into the perspective of one calendar year: Summer would be a total of 48 days, Spring and Fall would be a week each, leaving the remaining 10 months as Winter. Enjoy those 48 days of Summer while you can, because Winter is coming.
nice perspective, now swap the winter and summer times, and you have the seasonal pattern of southern arizona.
I'll teach it to you the way it was taught to me in 5th Grade Natural Science.
If geological time is equated to days, then this is what happens on Earth every 10 Days:
Earth spends 1 Day melting glaciers;
Earth spends 1 Day warm;
Earth spends 1 Day growing glaciers;
Earth spends 7 days under a blanket of glaciers.
You're not going to deny that, are you?
Lather, Rinse Repeat....
Mircea
Good point, and it points to something very common in the Universe and our little corner of it - cold is the rule, warm is the exception. All the stars, galaxies, nebulae and other bright/hot things in the universe represent very very little of the vast, empty, dark and very cold universe. Using thermodynamics and some agreed upon "size of the universe" estimates, the average temperature of the universe calculates out to about 2.5 degrees Kelvin, or just a hair over absolute zero.
Retained heat is actually something of a miracle for a rocky, inner planet. That's why even with our super deluxe atmosphere of much water and goodness, cold is our geological rule, while warm is the exception.
1: we spend the untold trillions, and ruin several economies around the world
Those several economies will be western ones such as the US, France, England....
Our economies will suffer while others will explode.
In the end, we'll just have industries move from countries with pretty good pollution controls to those with crappy controls.
Quote:
Originally Posted by Glitch
We happen to be approaching the end of one of those interglacial periods known as the Holocene Interglacial Period, which began 15,000 years ago.
Probably due to some SUV.
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One things for sure we all live on a moving planet: Icebergs, Volcanos, Plate Techtonics, Rain, Hurricanes, Title waves, and Sharknados
