1. The problem statement, all variables and given/known data I am actually an MD student, but I have been working on writing a novel. I wanted to create exoplanets that were suitable for human habitation, and I had a guy help me over the summer come up with plausible numbers for a variety of variables. Where I am having trouble now is figuring out how long a year would be on these planets as well as the length of an individual day. I attached the data that the individual gave me on some other variables. 2. Relevant equations If I wanted to figure out from this data: - Apparent luminosity (at planet) - Orbital period - Day length 3. The attempt at a solution - Apparent luminosity (at planet): 1.67657 - Orbital period: 0.715 Earth years - Day length: ??? I am not certain that any of these is correct, and I don't even know how to begin to figure out the last parameter (day length).