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Is Earth flat ? Options
Ashwin Joshi
Posted: Tuesday, December 13, 2016 8:30:27 AM

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If Earth really was a globe, airline pilots would constantly have to adjust their controls so as not to fly off into space.Think




Me Gathering Pebbles at The Seashore.-Aj
Lotje1000
Posted: Tuesday, December 13, 2016 8:44:48 AM

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NASA has actually answered this very question for you: Why can't planes fly into space?

It has more to do with air and gravity than it does with a flat or a round earth.
Blodybeef
Posted: Tuesday, December 13, 2016 8:57:35 AM

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Mass and gravitational pull of earth makes it very hard to fly into space. That's why we need huge rockets with massive power to fly the satellites into orbit.

“Integrity is doing the right thing, even when no one is watching." ― C.S. Lewis
Drag0nspeaker
Posted: Tuesday, December 13, 2016 9:42:19 AM

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Wyrd bið ful aræd - bull!
FounDit
Posted: Tuesday, December 13, 2016 10:24:31 AM

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What is holding up the turtle?

A great many people will think they are thinking when they are merely rearranging their prejudices. ~ William James ~
Drag0nspeaker
Posted: Tuesday, December 13, 2016 10:54:32 AM

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FounDit wrote:
What is holding up the turtle?





Wyrd bið ful aræd - bull!
MelissaMe
Posted: Tuesday, December 13, 2016 11:29:55 AM

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FounDit wrote:
What is holding up the turtle?


The same thing that is "holding up" the earth.

This is my only now.
NKM
Posted: Tuesday, December 13, 2016 11:37:43 AM

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From what I've been told, it's turtles all the way down.

coag
Posted: Tuesday, December 13, 2016 12:09:09 PM

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Ashwin Joshi wrote:
If Earth really was a globe, airline pilots would constantly have to adjust their controls so as not to fly off into space.Think

Unless you assume that Earth is an infinite disc, the theory of a flat Earth has problems with flying at the edge of Earth. Pilots would have to do some serious control adjustments there, to avoid flying off into space.
Shulamit
Posted: Tuesday, December 13, 2016 4:42:40 PM

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NKM wrote:
From what I've been told, it's turtles all the way down.



Yes. Turtles, turtles, turtles.

Richard Feynman was asked this question after a lecture. Little old lady stood up in the back of the auditorium and told Feynman his lecture about Suns and planets and solar systems and galaxies and gravitational forces and . . . was complete rubbish. Everyone knew that the world was a flat disk on the back of a turtle.

Feynman asked her (Oh, Feynman, Feynman! "Surely you are joking, Mr. Feynman"). "So what's holding up the turtle?" She told him he was a very clever man, but it was well known that it was .... Turtles all the way down.

Thanks to you DragOnspeaker, et alia, for reminding me of this.


Variety is the spice of life. Lack of variety is the spouse of life.
Shulamit
Posted: Wednesday, December 14, 2016 12:56:01 AM

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Yo! DragOnspeaker: On closer examination, I detect an elephant has sneaked itself in between your earthdisk and your very handsome, overhuge turtle.

This is something new, indeed! It would seem, from this large format photographic evidence, that we've been muddling about in a profound fog of ignorance concerning the science of this long accepted earthdisk and turtle theory. It could be that it's been a pachyderm - turtle - pachyderm - turtle - pachyderm - turtle all the way down configuration all along!

This false news epidemic is far more global and pervasive than we've been led to believe. If we can't trust the scientists, what is there left for us?

SAD.

Variety is the spice of life. Lack of variety is the spouse of life.
Jyrkkä Jätkä
Posted: Wednesday, December 14, 2016 3:32:51 AM

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The ancient Finns knew it better ;-)




In the beginning there was nothing, which exploded.
Drag0nspeaker
Posted: Wednesday, December 14, 2016 3:46:18 AM

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Quote:
On closer examination, I detect an elephant has sneaked itself in between your earthdisk and your very handsome, overhuge turtle.

Yes - here's an early Hindu ceramic picture which shows it more clearly. The tortoise (they say tortoise, rather than turtle) is called Akupara - don't know about the elephants.



Wyrd bið ful aræd - bull!
Ashwin Joshi
Posted: Thursday, December 15, 2016 12:25:37 PM

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'earth is flat, but still it revolves".

Me Gathering Pebbles at The Seashore.-Aj
thar
Posted: Thursday, December 15, 2016 3:35:36 PM

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Can I protest, as a geologist and rational scientist, about the ridiculous ideas about the Earth being put forward in this science thread. Turtles, elephants - ludicrous fantasies.

Everybody knows it is held up by the roots of the tree - the lands of the giants and the dark elves.



Whistle
MelissaMe
Posted: Thursday, December 15, 2016 8:43:36 PM

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Ashwin Joshi wrote:
If Earth really was a globe, airline pilots would constantly have to adjust their controls so as not to fly off into space.Think


Nope, that's another book - Yertle the Turtle by Theodore Seuss Giegel.

This is my only now.
MelissaMe
Posted: Thursday, December 15, 2016 8:48:24 PM

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thar wrote:
Can I protest, as a geologist and rational scientist, about the ridiculous ideas about the Earth being put forward in this science thread. Turtles, elephants - ludicrous fantasies.

Everybody knows it is held up by the roots of the tree - the lands of the giants and the dark elves.

Whistle


I am relieved to see the subject being treated with the seriousness it deserves!

This is my only now.
Ashwin Joshi
Posted: Wednesday, December 28, 2016 11:52:01 AM

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I believe its a globe with slight bulge at the equator.

Me Gathering Pebbles at The Seashore.-Aj
FounDit
Posted: Thursday, December 29, 2016 10:55:12 AM

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Turtles all the way down to...what??!! Riddle me that, Batman.

A great many people will think they are thinking when they are merely rearranging their prejudices. ~ William James ~
Ashwin Joshi
Posted: Monday, January 09, 2017 8:43:34 AM

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If the Earth was flat, we could travel to the place where the Earth and sky met. But we can’t.
If the Earth was flat, we could reach the place where we could reach out and touch the Sun. But we can’t.
If the Earth was flat, we could fall off the horizon. But we don’t.
If the Earth was flat, it would simply fall. But it doesn’t.
If the Earth was flat, a lunar eclipse would cast an oval shadow on the Moon’s surface. But it doesn’t.
If the Earth was flat, the lengths of all the shadows would be identical when measured simultaneously because all rays of sunlight that strike the Earth are parallel. But they vary.
But if the Earth is not flat, why does it look flat?


Me Gathering Pebbles at The Seashore.-Aj
leonAzul
Posted: Sunday, January 15, 2017 12:22:46 AM

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Ashwin Joshi wrote:
If Earth really was a globe, airline pilots would constantly have to adjust their controls so as not to fly off into space.Think




Yes, they do.

Think

"Make it go away, Mrs Whatsit," he whispered. "Make it go away. It's evil."
leonAzul
Posted: Sunday, January 15, 2017 12:39:04 AM

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Ashwin Joshi wrote:

But if the Earth is not flat, why does it look flat?


Any intelligent scientist would tell you that every theory worth considering states explicitly the scope of its application.

From the point of view of a carpenter, the Earth is indeed flat. One can meaningfully talk about plumb and level within that context, and things are more-or-less right and square. Farmers and politicians can also successfully use such a model for the calculation of seed dispersal and taxes, respectively.

A civil engineer grading a road or a mariner navigating the seas will have to take into account the curvature of the surface, and from that point of view the Earth is a sphere with local variations.

More critical applications, such as ICBMs and communication satellites, require a more elaborate model of the Earth as an oblate spheroid.

For each instance, the worth of the model is its ability to convey meaning for the user. An oblate spheroid Earth is utterly useless and unnecessarily complicated to a carpenter.

Please do not confuse the map with the terrain.

Think


"Make it go away, Mrs Whatsit," he whispered. "Make it go away. It's evil."
leonAzul
Posted: Sunday, January 15, 2017 12:52:14 AM

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FounDit wrote:
Turtles all the way down to...what??!! Riddle me that, Batman.


That's a reference to a critique of 'just so' cosmologies.

Or did you already know that, and I'm just being slow and stupid?

"Make it go away, Mrs Whatsit," he whispered. "Make it go away. It's evil."
TMe
Posted: Sunday, January 15, 2017 3:32:58 AM

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Astronauts and cosmonauts of various countries including those of Russia, India, Japan, French and China apart from the USA, who have visited the space, unequivocally vouch that our beautiful planet Earth looks blue and wonderful when seen from far off space.
This leaves no doubt about the Earth being a globe.


Pics of Planet earth as seen from space are available on google, but I don't know to copy those here.




I am a layman.
will
Posted: Monday, January 16, 2017 9:11:07 AM
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I’m assuming no one actually doubts the Earth is a sphere… but, as a thought experiment, it’s an interesting question. Without the application of critical thinking, it’s not uncommon for people to assume things just as daft. I’ll come right out and say it: if a certain holy book happened to explicitly state the Earth was flat, there would be plenty of people today absolutely convinced it was. Pray

Euclidean geometry is a more than adequate tool for common usage, due to the scale of the Earth compared to our local experience. Locally the sum of the internal angles of a triangle will be very nearly – but not exactly – 180’. Over larger scales Euclidean geometry breaks down; the shortest distance between London and Sydney is not a straight line and the sum of the angles between London, Sydney and the Beijing will be much more than 180’

Anyway, is it only me... I don’t actually think the Earth does look flat. Perhaps I instinctively see it as I do because I know the Earth is a sphere. From my office window, even on a clear day, I can see nothing in the next village 5 miles away. If I cycle there for a cheeky pub lunch, I see the tip of the church steeple about 3 miles out, most of the church a mile away and the whole village eventually. This reflects my common experience.


.
Ashwin Joshi
Posted: Monday, January 16, 2017 11:20:32 AM

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There you are. That is the fact, dear WILL. Applause

Me Gathering Pebbles at The Seashore.-Aj
TMe
Posted: Tuesday, January 24, 2017 9:42:15 AM

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Ashwin is right.





I am a layman.
Ashwin Joshi
Posted: Wednesday, January 25, 2017 4:39:35 AM

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Location: Jandiāla Guru, Punjab, India



Me Gathering Pebbles at The Seashore.-Aj
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