The Orion's Arm Universe Project Forums

Good blog on creating a fictional planet, with all the science involved:
https://worldbuildingpasta.blogspot.com/

It is! The latest episode, Tidally-locked planets, has some very interesting stuff. Particularly the bit about resonant-orbiting planets with 'double eyeball' hotspots.

I especially liked the post on Plate Tectonics.

AHHhhHhhhhhhhhHHHHHHHHHH

I know the guy who creates the blog, I used the blog actually, but I forgot to mention it here...

Yeah, it is a superb blog!