The Hole at the Pole

[MGmirkin]

(The Hole at the Pole; May 27, 2008)

The disc's roundness obviously squares with the common understanding that the sky is circular, if not spherical. But why does it have such a conspicuous aperture in the middle?

[Read more] ...

[Meatwad]

Maybe they were Black Sabbath fans?

Do really big aurora show a hole in them?

If this was just an Asian thing I'd say it was just coinage tradition to make a hole.

[Marnee]

"At times of intense electric flux, this auroral column could have appeared to human eyes as a colossal hollow tube."

At what distance from the surface of the earth might this occur/be seen?

[moses]

There is another interesting theory for holes in the sky. If interplanetary
interactions produced a lot of dust, then the ionosphere, or thereabouts,
could have been nearly opaque in sunlit regions, but where the shadow of
the Earth fell on this ionospheric region the stars, and especially the planets,
would have been visible. The shadow of the Earth would create a hole in the
sky. Of course this hole would appear to move during the night. Thus very
different from the hole at the pole. But still the planets were destructive
gods to our ancestors, so the 'shadow' hole would have been of great
significance to them.
Mo