Alternate Planets, Suns, Stars, and Solar Systems Thread

It's true; an Mars-size planet hit the early Earth and formed the Moon; however, if it were changed, say twice as large or more of the material was ejected into space to form the Moon, things will be different on Earth.

1. Most scenarios, the Mars-like Moon would not have a magnetic-field due to not having a solid metal-core; That metallic-core sank into the Earth when the impact that formed the Moon occurred.
2. Earth's gravity may be stronger due to a larger impact.
3. Spin would be faster. Days would be shorter even today.
4. Tides of a Mars-sized Moon would be greater than today; I want to say twice as great, but I don't know the exact math.
5. Mars-like Moon, being closer and without a magnetic-field would have more solar-wind striking it's atmosphere. However, there might be tidal-forces squeezing gasses out of the Mars-like Moon so the atmosphere may be thicker.
6. As it stands right now, Mars is capable of having running, liquid-water due to just the right temperature, air-pressure and salinity of the water. (Mar's water is extra, extra full of salts).
7. Mars-Like Moon will be eventually tidally-locked; probably not as early on has the Moon.
8. Mars-like Moon will probably have microbial-life and it's presence would certainly effect how life evolves on Earth; we probably wouldn't be here.
 
Interesting map that I came across when I googled. The basis is the Earth, but the poles have been changed. Obviously, in reality this would have changed evolution a lot, so the discussion of the development of civilizations assume that a species comparable to humans still would develop. http://www.worlddreambank.org/J/JAREDIA.HTM

Edit: And here are some more: http://www.worlddreambank.org/S/SHIVERIA.HTM
http://www.worlddreambank.org/S/SEAPOLE.HTM
http://www.worlddreambank.org/T/TURNOVIA.HTM
 
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Interesting map that I came across when I googled. The basis is the Earth, but the poles have been changed. Obviously, in reality this would have changed evolution a lot, so the discussion of the development of civilizations assume that a species comparable to humans still would develop. http://www.worlddreambank.org/J/JAREDIA.HTM

Edit: And here are some more: http://www.worlddreambank.org/S/SHIVERIA.HTM
http://www.worlddreambank.org/S/SEAPOLE.HTM
http://www.worlddreambank.org/T/TURNOVIA.HTM
This is a classic. You need to know this.
https://www.alternatehistory.com/forum/threads/planetocopia-map-thread.368765/
There are several timelines about these worlds in AH.com
 
But probably later development of civilizations for the reasons that Jared Diamond mentioned.
Well, that depends on if he's right! With a sample size of one, and for the matter one with a built-in discrepancy between the two comparably-sized areas....
 
Do you know any internet site where you can pick a point on the map and choose it as one of the poles and then see the world with latitudes and longitudes?
There's a program for it that you can download here, though I don't think it shows coordinate lines. For that, you should be able to import the new map into G.Projector.
 
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