Academy of Sciences of Heroesland

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Ment

The second universe is an open, infinite space described by three dimensions (that is, exactly how we see it with our ordinary perspective).

The first explains expansion (if you take a camera from a ball, draw something on it, and start inflating it, the drawn object will begin to increase, uniformly in all directions, and the larger it is, the faster it increases). All that remains is to understand who the guy with the pump is... And how can expansion be explained using the second one?

Ment

Well, yes, but I don't like that terminology. Obviously, it is impossible to ensure closure in two dimensions. Here, it is more important how such a manifold looks to the observer, and not how it looks to the objects inside itself, in my humble opinion. Although I don't argue about the dimension of the manifold; the terminology is accurate there, but with the dimension of the figure – yes)).

And regarding this, what do you say?:)

Hermit

A geometric locus of points in space equidistant from a given point.

Yes, the surface of the Earth is exactly a sphere. There are no mountains or depressions on it...:rolleyes:

Drakkosha

But the Earth is not round, not spherical, and not even ball-shaped; it is a geoid.

And not even a geoid. It simply resembles it more accurately than other named surfaces.

Added 2 minutes ago

Nebo

Georoid.

Nebooid.

Arandor

Goreit

Arandoroid.

Ничто не возникает из ничего и ничто не пропадает бесследно.
Если где-то чего-то убудет, то в другом месте добавится.
(Закон сохранения).

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