dls

New to the forum, so hello. I was hoping I could get a little help with a feature in a book I'm writing (intending to publish on Lulu). I'll add thanks for any help given here at the start of the book. Really I write for my own cathartic reasons, so don't expect to see your name in lights and read by millions, but anyway... I have a fundamental grasp of physics from the work I've completed thus far on my science degree. But planetary and astrophysics is something of a tricky area for me. The planet in my book is called Kirov and its a 'gemini planet'. The world's rotation matches with its solar orbit so that one side is permanently facing space, the other permanently facing the sun, a mirror of the way the moon orbits the Earth. I see this planet as ferociously hot on the sunward side, and permafrost on the other. A narrow band called the vignette zone encircles the polar circumference and this enjoys moderate climate at the dead centre, graduating to extreme heat and freezing temperature at either edge. At the polar ends of the world there are probably widening regions of relatively habitable temperature. So, what would the atmosphere be like? Would there be an atmosphere? If so what would the main elements be. What would the two horizons look like from the centre of the vignette zone and what would the vignette zone look like from the hot and cold hemispheres respectively? What would the whole thing look like from space? What would the geology of the planet be like? Meteorology? The sun is virtually the same as our own sun and Kirov is about the same distance away as the Earth, to make things simpler. The planet revolves on a vertical axis, with no tilt, so probably no seasonal changes and the hot side would rarely have a chance to cool down, just like the cold side would never have a chance to warm up. Then again, would there be a transfer of heat around the planet as a result of coriolis effect etc? I look forward to seeing what you make of it and thanks in advance for any advice. Would prefer posters stick to topic and not provide advice on the pitfalls of Lulu or the futility of writing ones own sci-fi etc. cheers. Dave