my build-a-world-from-scratch project is now named najma ! many stars have arabic names for obvious historical reasons , and , after going through several , i decided on najma , which sounds nice and means " star " , so that is the star's name :)
i've been working on the geographic features of najma c for a while now . i didn't want it to just be a venus analogue given that najma b is basically just big mercury , and i'm very happy with the end result :
it started with the atmospheric features . the main feature that's different than venus is that it's tidally locked , which has huge ramifications for the atmosphere . so !
it's a lava-ice planet featuring a large eruption fissure near the substellar point that spans 17 degrees of latitude running north south , and on the nightside there are huge ice cliffs with varying layers of CO2 and SO2 ice . along the south in the libration zones , there's araneiform terrain like mars has and also evaporite fields with yellow and white gypsum roses and hopper crystals . along the terminator , there are huge fields of perfectly aligned yardangs and ventrifacts .
i Could make a map at some point ... maybe . the map of najma d , where i plan to put life , is infinitely more important . but that's going to take a lot of time because i want to model a full continental history of at least a few hundred million years :) so i think i'm going to work on the other planets first , get their current atmospheric and geographic features understood without worrying about their plate tectonics ( if they have any ; b and c do not , and f is an ice giant ) , and then begin tackling d more thoroughly