Southern cross complete question

In June, a man at McMurdo station can see the southern cross pretty much overhead all night (24 hr darkness). It will circle around a point directly south once every 24 hours.  Three men in Buenos Aires, Capetown, and Sydney will see the southern cross due south of them, granted at different times, but at all those times, whatever precise times they may be, the man at McMurdo can still see it above his head. Can anyone explain how the man at McMurdo can see the southern cross south of him at the same time as night in Sydney or Capetown? A diagram would be helpful.

Also, if the southern cross traveled around the edge so as to appear in the south in Capetown, Buenos Aires, and Sydney during their different nights, wouldn't it have to be moving around the edge at 1 revolution per day? Wouldn't it appear to travel across the sky? Wouldn't it not be straight south all night, but start way on one side, go through south, and off to the other side?

I may be misunderstanding exactly what you are saying, but to clarify.
The southern cross is not due south. It points ~south.
It will circle a point due south for all observers in the southern hemisphere.

The same applies for the person at McMurdo. It will circle a point due south, and as they are south enough, at times it will appear north of them.
While it appears south of a person in sydney, it will appear north of a person at mcmurdo.

The real killer is the south celestial pole, always appearing due south.

Are these forums built to share information and general inquiries?

Are these forums built to share information and general inquiries?

Yes, this is the Flat Earth Debate Forum.

This forum is for debates on Flat Earth Theory. Opposing viewpoints are, as always, welcomed -- but please keep the discussion serious and intelligent.

The response you get, however, depends on who is prepared to answer - the society has no "staff" to answer queries, so you take what you get.

More general debates about flat earth related issues are better done in the Flat Earth General forum.

This board is for discussion about the Flat Earth Society or the Flat Earth movement in general. For example, if you want to ask questions about The Conspiracy, flat earth believers and their beliefs, or anything else not related to Flat Earth Theory, this is the place for it.