I expect it will be a number of books, but I'm looking a book which will cover topics such as: LaGrange points, brown dwarfs, black holes, etc. I much prefer physical books, but a pdf is ok. I'm guessing some aspects of world building such as spin, seasons, earth's magnetic field, etc may fall under geography.
Thanks for your help![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Thanks for your help