[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 59 KB, 310x310, Earth[1].jpg [View same] [iqdb] [saucenao] [google]
5130980 No.5130980 [Reply] [Original]

I don't know how to express this without sounding like a troll, but fuck it.

Let's say you take the earth and put it on a square piece of paper. Going from the left side to the right side makes you wrap around the paper and continue on. Why is it that when you reach the top, you don't magically clip to the bottom of the paper like you would expect? Is there a name for this?

>> No.5130990

I have no idea what you're trying to say.

>> No.5131001
File: 83 KB, 500x500, Untitled-1.jpg [View same] [iqdb] [saucenao] [google]
5131001

>>5130990
Sorry, I don't really know how to express it

>> No.5131002
File: 223 KB, 310x310, teleportation.png [View same] [iqdb] [saucenao] [google]
5131002

>>5130980
Do you teleport as shown in the image when you travel halfway across the atlantic ocean?

>> No.5131008

>>5131001
This is even more confusing.

>> No.5131009

>>5131002
You know what I mean. See >>5131001

>> No.5131011

>>5131008
I know, this is why I want an explanation on how it works like this

>> No.5131012

>>5131009
It's the same thing. The map distorts your view of the Earth. The green line in your image is actually straight without bends

>> No.5131022

>>5131001
If I understand right, you're having trouble with the idea that you'd wrap around directly from the Antarctic to the Arctic. Well, that's because a 2D representation of a 3D object can't be a good representation, and you have to either elide latitude or elide longitude if you want to put everything in a flat plane.

>> No.5131026

So, you play civ,?

Anyway, I think I know what you mean. If you want a real explanation of this, go study topology and manifolds.

The short answer is that when you wrap it around the equator, your paper is basically a cylinder. You could wrap around the other way so walking along a line north to south would get you all the way around (north -> south -> north), but then you can't walk around along the equator.

Just take a piece of paper and wrap it around. You always get a cylinder. There is no way to make a sphere that connects opposite edges.

Besides, mapping the sphere onto a rectangular shape distorts the surface anyway.

>> No.5131031

For what you are thinking about to work, the earth would need to be a torus.

>> No.5131036

>>5131031
Isn't a torus basically a donut shape? Isn't it like one of the most efficient shapes, like a sphere or hexagon?

>> No.5131040

>>5131036

I dunno about efficiency, but yes, donut shaped.

>> No.5131037

>>5131036
Efficient for what?

>> No.5131042

>>5131037
Like circles maximize volume per surface area

>> No.5131087

>>5130980

OP, go look at a globe.

/thread

>> No.5131336

I don't think the fellow has ever seen Bucky Fuller's "Dymaxion Air-Ocean World Map".
He projected the globe onto an exospheric icosahedron, the unzipped the polyhedron.

>> No.5131348

typo: " then unzipped the polyhedron"