Please pardon me for being simple, and starting over with my "stick man" representation here. I know it's not to scale I'm just trying to maybe ask my question with a picture, since words are not always as clear and/or can cause unnecessary sticking points.
I'm showing the earth looking up from the south simply because we're all used to seeing west and east in the left and right positions. I am in the US so that is why it is on top. You should be able to get a reference as to where everything is from this pic. The moon is represented as full, because it is usually full or a large portion of the moon is visible when I notice it in the daytime sky.
What I've seen from the western part of the US is the moon in the west and the sun in the east. This is visible pretty much from sun up until around 8 am in the spring. (most recent recollection, and actually I can't say how much longer than that simply because I work indoors and cannot watch the movement.) Both the sun and moon were pretty good sized so they were closer rather than farther away.
So, my question is, how can any place below the line see the moon in their night sky when it's in the daytime sky in the area above the line?
Please answer using representations like this simple one, with whatever shape you think the earth may be. What's visible or not visible on a globe is not well explained on a flat representation. unless you're saying it's flat, but I don't think you are. In checking the premise, if it's not a ball and we've misunderstood, than what is it? Neil deGrasse Tyson's oblate spheroid has pretty much the same problem with this question of moon visibility.
Thanks
The moon moves, but very slowly, and for day/night cycles, you can think of it as essentially static (30x slower than earth moving 12 deg per night). Two points, therefore, 180 deg apart and within the plane of rotation of the moon on a sphere, cannot see the same thing at the same time. If the two points are not in the same rotation plane of the moon (for instance one at the North Pole, one at the south), then they can see the same moon. You would need to compare equatorial countries, or at least ones within +/- 25deg latitude of the equator to really prove the point. Can't compare a far north northern hemisphere location, and a far south Southern Hemisphere location because of the earth's 66.6 deg tilt from horizontal...;)
I really don't know what to do with this. I don't see how speed of rotation is a factor, nor countries or tilt. And I don't understand how the north and south pole can see the moon at the same time, being on opposite ends. What does "rotational plane" look like. I cannot picture this stuff to wrap my brain around it, which is why I went for a simple diagram.
Sorry I forgot you were the commentor above. This is answered in our discussion above. In short, the earth spins once completely each day, so everyone gets a chance to see the moon at different times throughout. Should be visible around 12-ish hours in any given 24 hours in any location
Just picture two points on a ball, inside a room with a picture on the wall. If the two points are at the top and bottom of the ball, they could both conceivably see the picture despite the ball spinning. Now place those two points further down, and in a more horizontal plane, and they only see the object when they rotate toward the wall with the picture. All I'm saying (the picture is the moon). Anyway, I think there are easier FE arguments, this one gets tricky. Rest assured, the truth will hopefully be revealed soon. Simone has got to send something up independently to see this thing and settle it. Hopefully soon, one way or the other.
I have a tendency to question everything that doesn't make sense to me. Everything