How would You prove the World is Round?

[PureX]

It was Eratosthenes (a Greek) working in Egypt under Roman control.

Those Greeks were clever folks.

 

[Cooky]

[I know the obvious answer is NASA photos from outer-space, but I want to see who can figure it out the old-fashioned way. ]

Dang! I was just about to say that.

 

[SalixIncendium]

If you are trying to navigate, whether its by boat or plane, you're going to need to know the world is round to know where to go.

If there are still operable planes, it kinda negates the need for me to do much more than take someone up in one to demonstrate the earth is round.

 

[Cooky]

If there are still operable planes, it kinda negates the need for me to do much more than take someone up in one to demonstrate the earth is round.

Yeah, but all the fuel tanks have rust holes in them. There's no way those planes are getting off the ground.

 

[SalixIncendium]

Yeah, but all the fuel tanks have rust holes in them. There's no way those planes are getting off the ground.

View attachment 35026

 

[Cooky]

Oh great...

 

[Wandering Monk]

How else would you prove you’re better than everyone else other than to prove others wrong.

That's the fun of it!

 

[Wandering Monk]

Dang! I was just about to say that.

How's the eye?

 

[Shad]

The year is 2153. Technological civilisation has collapsed and all the knowledge of previous generations has been lost in the mists of time.

You are amongst the survivors, now trying to rebuild civilisation. You have heard a rumour that the "ancients" of previous centuries believed the world is round. So you decide to investigate.

Using your own observations based on your sense-perception, how would you set about proving (or disproving) this that world is round?

[I know the obvious answer is NASA photos from outer-space, but I want to see who can figure it out the old-fashioned way. ]

Horizon limits as per the Greeks millennia ago.

 

[Cooky]

How's the eye?

Doing much better...

 

[Twilight Hue]

The year is 2153. Technological civilisation has collapsed and all the knowledge of previous generations has been lost in the mists of time.

You are amongst the survivors, now trying to rebuild civilisation. You have heard a rumour that the "ancients" of previous centuries believed the world is round. So you decide to investigate.

Using your own observations based on your sense-perception, how would you set about proving (or disproving) this that world is round?

[I know the obvious answer is NASA photos from outer-space, but I want to see who can figure it out the old-fashioned way. ]

Look at every planet out there. Look at the moon. What shape are they?

 

[Heyo]

The Romans did it by sending out two "runners", one to the distant north, the other to the distant south, and having them record the angle of the sun at the same time on the same day. From that they could not only surmise that the Earth was a sphere, but they were even able to calculate a reasonable approximation of the size of the sphere. (Or was it the ancient Greeks, I'm not sure. I think it was the Romans, though.)

It were the Greek of course. If has to do with science or philosophy it's most probably the Greek, if it's law or architecture the Romans are the better bet.
Eratosthenes - Wikipedia

 

[PureX]

It was Eratosthenes (a Greek) working in Egypt under Roman control.

So I was 1/3 right.

 

[Stevicus]

The year is 2153. Technological civilisation has collapsed and all the knowledge of previous generations has been lost in the mists of time.

You are amongst the survivors, now trying to rebuild civilisation. You have heard a rumour that the "ancients" of previous centuries believed the world is round. So you decide to investigate.

Using your own observations based on your sense-perception, how would you set about proving (or disproving) this that world is round?

[I know the obvious answer is NASA photos from outer-space, but I want to see who can figure it out the old-fashioned way. ]

Well, the old fashioned way might go something like this:

 

[Stevicus]

Look at every planet out there. Look at the moon. What shape are they?

The Moon is a giant cheese which has been cut and molded into a round shape.

 

[Skwim]

I always thought Eratosthenes' method for finding the size of Earth was kind of ingenious in that it also showed the Earth is a sphere.

Illustration Eratosthenes' method for calculating the circumference of the Earth.
Sunbeams are shown as rays hitting the ground at Syene (modern Aswan) and
Alexandria. The angle between the sunbeam and the gnomons (vertical pole) is
7% (~1/50th of 360 circle). Eratosthenes calculated the circumference of the
Earth by multiplying the distance between Alexandria and Syene by 50.
Source: Wikipedia

.

.​

 

[Wandering Monk]

God I love those Greeks!

 

[Bob the Unbeliever]

The year is 2153. Technological civilisation has collapsed and all the knowledge of previous generations has been lost in the mists of time.

You are amongst the survivors, now trying to rebuild civilisation. You have heard a rumour that the "ancients" of previous centuries believed the world is round. So you decide to investigate.

Using your own observations based on your sense-perception, how would you set about proving (or disproving) this that world is round?

[I know the obvious answer is NASA photos from outer-space, but I want to see who can figure it out the old-fashioned way. ]

I would observe the shadow of the earth on the face of the moon, over more than one eclipse.

A flat earth, would eventually display a varying shape in the shadow, only a spherical-like object would show the consistent shadow we observe.

Done.

 

[Earthtank]

how would you set about proving (or disproving) this that world is round?

I would tell them to go and jump off the edge of the earth. Kinda like this clip (love this show)

Watch from min 16:00 to 16:40. If Dinosaurs could do it, so can I

 

[roger1440]

The year is 2153. Technological civilisation has collapsed and all the knowledge of previous generations has been lost in the mists of time.

You are amongst the survivors, now trying to rebuild civilisation. You have heard a rumour that the "ancients" of previous centuries believed the world is round. So you decide to investigate.

Using your own observations based on your sense-perception, how would you set about proving (or disproving) this that world is round?

[I know the obvious answer is NASA photos from outer-space, but I want to see who can figure it out the old-fashioned way. ]

If "all the knowledge of previous generations has been lost in the mists of time", we would be back to hunting and gathering. My fellow cave dwellers would write me off as a nut case for contemplating whether the Earth is round or not. We would have more pressing issues to wrestle with.