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Earth tilt


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#1    Resh

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Posted 26 October 2013 - 07:23 PM

Hey everyone.

Ive heard the earth is tilted. If so, when did it first tilt? has it always been tilted?

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#2    AtlantisRises

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Posted 26 October 2013 - 07:40 PM

Few weeks ago. Scientists are worried that if it continues in this fashion we will fall off. Surf life savers are worried that if it tilts anymore that they will have to drive further to get to the beach,

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#3    Insanity

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Posted 26 October 2013 - 07:48 PM

View PostSpiritus Spacium, on 04 October 2013 - 08:17 PM, said:

dude are you trolling? seriously

This was my thought on this thread.

"We see things only as we are constructed to see them, and can gain no idea of their absolute nature. With five feeble senses we pretend to comprehend the boundlessly complex cosmos, yet other beings with wider, stronger, or different range of senses might not only see very differently the things we see, but might see and study whole worlds of matter, energy, and life which lie close at hand yet can never be detected with the senses we have." - H.P. Lovecraft, "From Beyond" Published 1934

#4    Ryu

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Posted 26 October 2013 - 08:26 PM

I read that one of the reasons the earth tilts might be is the distribution of mass. i.e continents and so on.


#5    StarMountainKid

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Posted 26 October 2013 - 10:52 PM

Maybe this is why I feel more and more off balance as I've grown older.

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#6    Likely Guy

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Posted 27 October 2013 - 01:16 AM

You've 'heard' that the earth is tilted? That's why we have seasons. So yeah, since we've always had seasons, the earth has always been tilted.

Factoid: Earth's axis is tilted about 23 1/2 degrees while Uranus' axial tilt is 97.77 degrees. That means that Uranus doesn't spin like the rest of the planets, it actually rolls along the plane of the solar system during its orbit.


#7    simplybill

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Posted 27 October 2013 - 01:32 AM

Read "Earth in Upheaval" by Immanuel Velikovsky, and then quote a few passages from the book.
You may not learn a lot of sound science, but this forum will light up like a Christmas tree.

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#8    Likely Guy

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Posted 27 October 2013 - 03:00 AM

View Postsimplybill, on 27 October 2013 - 01:32 AM, said:

Read "Earth in Upheaval" by Immanuel Velikovsky, and then quote a few passages from the book.
You may not learn a lot of sound science, but this forum will light up like a Christmas tree.

In my opinion, it was fanciful thinking. No harm in that, but nothing to believe in.


#9    Setton

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Posted 27 October 2013 - 11:06 PM

View PostRyu, on 26 October 2013 - 08:26 PM, said:

I read that one of the reasons the earth tilts might be is the distribution of mass. i.e continents and so on.

That wouldn't work. Gravity pulls towards the centre of the earth so distribution of mass would not change the tilt.

In truth, no one knows for sure why the axis is tilted (maybe an early impact just after formation) but it varies on a 41,000 year timescale and is the reason we can live on this planet.

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#10    White Crane Feather

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Posted 30 October 2013 - 10:16 AM

It probably happened when the earth collided with a Proto planet. The same event probably also set the stage for the formation of the moon.

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#11    jesspy

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Posted 30 October 2013 - 11:21 AM

Maybe if we get everyone to the side of the tilt and push the ground we could straighten the planet up. LOL sorry. When I was young my friends dad said the earth was tilted but if we push the ground hard we can straighten it up. He was also one of those guys that spun a globe to make us dizzy. lol

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#12    Leonardo

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Posted 30 October 2013 - 11:51 AM

View PostSpiritus Spacium, on 26 October 2013 - 07:23 PM, said:

Hey everyone.

Ive heard the earth is tilted. If so, when did it first tilt? has it always been tilted?

Because space has no 'direction', and so no 'up' or 'down', we can only consider the attitude of our planet with respect to something which might define a 'direction'. In this case, we use the solar system, and refer to planetary attitudes with respect the plane of their orbit around the sun. In Earth's case we call this the plane of the ecliptic (or just 'ecliptic'), taken from the sun through the orbit of Earth around it.

While our planet orbits in this plane it also rotates around an axis (with a little wobble), and this axis of rotation is the tilt of Earth to the ecliptic. This axial tilt is ~23.5 degrees from the vertical.

As to why our planet has a tilt, there are various theories including the distribution of mass when our planet was being formed, through to several 'collision' theories. There is a theory our planet had a greater (~45 degree) tilt in the distant past and some event - mooted to be a collision - altered that to it's present value.

Most of the theories for Earth's axial tilt are detailed on the internet, and my suggestion is you research them a bit more there if you wish to understand them in greater detail. :tu:

Edited by Leonardo, 30 October 2013 - 12:04 PM.

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#13    Frank Merton

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Posted 30 October 2013 - 12:02 PM

View PostWhite Crane Feather, on 30 October 2013 - 10:16 AM, said:

It probably happened when the earth collided with a Proto planet. The same event probably also set the stage for the formation of the moon.
It may be an event of a collision in an ocean about 600 million years ago for with there is rudimentary evidence and may have been an element leading to conditions that brought on the Cambrian Explosion of multi-cellular life forms.


#14    Ryu

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Posted 01 November 2013 - 02:13 AM

View PostSetton, on 27 October 2013 - 11:06 PM, said:

That wouldn't work. Gravity pulls towards the centre of the earth so distribution of mass would not change the tilt.

In truth, no one knows for sure why the axis is tilted (maybe an early impact just after formation) but it varies on a 41,000 year timescale and is the reason we can live on this planet.

I don't know...the earth is not a solid object in that it has layers and the outside is literally "floating" on a liquid. (crust floats on the mantle which is comprised of magma)
So if there is a large enough shift in the distribution of mass, wouldn't that affect the planet's equilibrium?
And if there is no gravity in space then why should any planet have any degree of tilt?


#15    Setton

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Posted 01 November 2013 - 01:49 PM

View PostRyu, on 01 November 2013 - 02:13 AM, said:

I don't know...the earth is not a solid object in that it has layers and the outside is literally "floating" on a liquid. (crust floats on the mantle which is comprised of magma)
So if there is a large enough shift in the distribution of mass, wouldn't that affect the planet's equilibrium?
And if there is no gravity in space then why should any planet have any degree of tilt?

Not really. But that's a common misconception. The mantle is not liquid, it's only partially (and quite a small part) molten. The only liquid part of the Earth is the outer core. More mass wouldn't tilt a planet as the force is towards it's core not 'downwards'.

Who ever said there was no gravity in space??? Gravity affects things over an infinite distance but by a decreasing amount (the equation is F = (GM1M2)/r2 if you're interested) but always towards the centre of the two objects.

'Good' is not the same as 'nice'.
'No, murder is running your broadsword through someone because he worships a different God to you... Or is that evangelism? I get confused.'
When they discover the centre of the universe, a lot of people are going to be disappointed - They are not it.
I don't object to the concept of a deity but I'm baffled by the notion of one that takes attendance.




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