Okay, so I've found some threads about the day/night cycle and seasons of habitable moons orbiting gas giants, but what if we replace the gas giant by a brown dwarf (i.e. the sub-stellar object class that's between a star and a planet in mass and properties)? The basic idea of my world is that the habitable portion consists of five habitable moons orbiting this brown, which itself orbits the system's star. If my understanding is correct, these moons would have different temperatures based on their proximity to the brown dwarf as it does emit a small amount of radiation. What messes me up a bit is the effect that orbiting a brown dwarf would have on the day/night cycle of the moons as well as the seasons. First, I know it's probably best to assume that all the moons are tide-locked, which means that one side of each has a day (that varies in length based on orbit) which the brown dwarf interrupts with an eclipse and one side which never sees the brown dwarf as it faces out. So what do we get, a day/night cycle in which one side has brighter days, darker nights, and more temperature fluctuations, and the other side has dimmer days, brighter nights and less temperature fluctuations? What effect would that even have on climate?
Now, what if I wanted to add some slight seasons in the mix? Do I just need to tilt the orbit of the brown dwarf and its satellites? And what impact would that have on the day/night cycle?
So as a summary, I'm asking 3 main questions:
- (Main question): What are the differences between living on a (hypothetically) habitable moon tidally-locked to a gas giant vs tidally-locked to a brown dwarf
- (Sub-question): What impact would the planet --> brown dwarf switch have on the day/night cycle of a habitable moon and its climate
- Assuming I am correct in saying that I can create some seasons by tilting the axis of the whole system, what would be the impact of doing this.
Pick and choose which questions you feel like answering, I'm not picky. Thanks!