I know, it sounds a little more epic than it really is. It is true, however. I am in the process of writing a story and would very much like to have the specifics of the other planet described at one point to the reader so they can get a grasp on the world part of the story is taking place in. Now while I could just use the the "it's magic" to describe the planet, I think a lot of people would get a kick out of getting a small glimpse on how a planet like this might be able to exist right here in our own universe. I know jack all about cosmology though. Except that most planets may or may not have something that resembles a rock like substance. Unless it is made of something else, then it wouldn't be made of rock anymore. Some if you have the time, patience or imagination, I would appreciate the help. Here is a list of specifics I would like to see in this world, along with some general questions. → This planet is roughly the size of Jupiter → This planet has an Earth like environment that is capable of supporting all kinds of life from mammal, reptilian, avian, microscopic, bacterial, etc etc. → This planet does have large bodies of water, land masses and expansive crystaline structures and outcroppings, some even large enough to see from long distances. Some general questions I would like to know. → What would the general day and night cycle be? → How many hours would be in a full day? → What would be the general length of the seasons if the seasons adhered to the standard four being: spring, summer, fall, winter? → Where in the solar system would this planet have to be placed to maintain it's size, but still be able to support life like Earth does? → How many moons would it need to have to affect the tides much like our moon does, but not yank everything off the planet due to gravitational shears? With most or all of those questions answered, and being backed by science and the imagination, I think I could construct a planet both wonderful and realistic for the story to take place on. So, any help would be appreciated.