Sunrise, sunset, moon, stars rise and set. If the world is flat it must have an edge. Travel and try to find it. If you end up where you started, it is a sphere.
Well how would you explain the apparent movement of the stars across the night sky other than by a spherical rotating earth?
#12
You ask me? The universe could rotate around a flat earth. A disc can rotate as in flipping a coin. Just some devil's advocating, you can't convince me we that live on a flat earth.
You ask me? The universe could rotate around a flat earth. A disc can rotate as in flipping a coin. Just some devil's advocating, you can't convince me we that live on a flat earth.
I do live in a flat world. A person walking up to me appears as a dot. My whole awareness is lines and dots. That's why knights confuse the hell out of me.
Actually, I don't think knights are real.
Actually, I don't think knights are real.
You see the flag of the boat before the anchor. That's why the earth is spherical.
@what_game_is_this said in #13:
> #12
> You ask me? The universe could rotate around a flat earth. A disc can rotate as in flipping a coin. Just some devil's advocating, you can't convince me we that live on a flat earth.
If the stars rotated (rigidly) around a flat Earth they would all have the same direction of rotation – say, anticlockwise, no matter where you are on that imagined flat Earth. That's because there could only be one (visible) celestial pole: en.wikipedia.org/wiki/Celestial_pole
Well, there actually could be two celestial poles visible, but in that case they would both have to lie within the imagined plane of the Earth, they would appear to be exactly on the horizon from everywhere on that flat disk. This would be equivalent to the disk rotating (like a flipping coin) along its principal axis.
In that case (two celestial poles on the horizon for every observer) the stars could be infinitely far away (very far away when compared to the diameter of the disk). However, when only one celestial pole is visible (from anywhere on Earth), the stars near to it cannot be infinitely far away, otherwise their angle of elevation (above the horizon) would be the same for every observer on the imagined flat Earth. Since Polaris is not seen at the same angle of elevation from everywhere on Earth, this would mean that – under the assumption of a flat Earth – Polaris would need to be local, much closer to the north pole than the radius of the disk.
All of this isn't what we observe: In the Northern Hemisphere stars appear to move anticlockwise around the north celestial pole (right next to Polaris), in the Southern Hemisphere they go clockwise around the south celestial pole (near Sigma Octantis).
The angle of elevation of the stars near the celestial poles varies from place to place, at the equator they are both visible at the horizon, anywhere else one is visible and its elevation depends on the latitude of the observer. In short: A flat Earth does not match these observations at all.
> #12
> You ask me? The universe could rotate around a flat earth. A disc can rotate as in flipping a coin. Just some devil's advocating, you can't convince me we that live on a flat earth.
If the stars rotated (rigidly) around a flat Earth they would all have the same direction of rotation – say, anticlockwise, no matter where you are on that imagined flat Earth. That's because there could only be one (visible) celestial pole: en.wikipedia.org/wiki/Celestial_pole
Well, there actually could be two celestial poles visible, but in that case they would both have to lie within the imagined plane of the Earth, they would appear to be exactly on the horizon from everywhere on that flat disk. This would be equivalent to the disk rotating (like a flipping coin) along its principal axis.
In that case (two celestial poles on the horizon for every observer) the stars could be infinitely far away (very far away when compared to the diameter of the disk). However, when only one celestial pole is visible (from anywhere on Earth), the stars near to it cannot be infinitely far away, otherwise their angle of elevation (above the horizon) would be the same for every observer on the imagined flat Earth. Since Polaris is not seen at the same angle of elevation from everywhere on Earth, this would mean that – under the assumption of a flat Earth – Polaris would need to be local, much closer to the north pole than the radius of the disk.
All of this isn't what we observe: In the Northern Hemisphere stars appear to move anticlockwise around the north celestial pole (right next to Polaris), in the Southern Hemisphere they go clockwise around the south celestial pole (near Sigma Octantis).
The angle of elevation of the stars near the celestial poles varies from place to place, at the equator they are both visible at the horizon, anywhere else one is visible and its elevation depends on the latitude of the observer. In short: A flat Earth does not match these observations at all.
@Raspberry_yoghurt said in #7:
> This is why I sometimes get the urge to take a step forward for no reasoon!
Be careful not to fall into the very, very deep Zugzwang canyon!
> This is why I sometimes get the urge to take a step forward for no reasoon!
Be careful not to fall into the very, very deep Zugzwang canyon!
@Raspberry_yoghurt Your second method requires a lot more work than your first method.
you wouldnt be able to know that,the ship sailing theory is wrong also,some parts of the earth could be spherical and others not,The earth might be flat with bumps that cause the spherical dellusion when the ship sails away.
@Raspberry_yoghurt said in #6:
> Look a ships sailing away on the horizon. The ship itself disappears while the mast still is visible. If the eart was flat, both ship and mast would just get smaller and smaller and disappear at the same time.
>
> That's how they realized it in ancient times.
SPOT ON :) yes
I mean theres also a way if u were to sail/walk a LOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOONG way:
-If flat, you will meet an edge
-if round, you will get back to where u started
> Look a ships sailing away on the horizon. The ship itself disappears while the mast still is visible. If the eart was flat, both ship and mast would just get smaller and smaller and disappear at the same time.
>
> That's how they realized it in ancient times.
SPOT ON :) yes
I mean theres also a way if u were to sail/walk a LOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOONG way:
-If flat, you will meet an edge
-if round, you will get back to where u started
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