Regarding astronomy, I should have been more specific. Can total eclipses happen? Because moons blocking the sun happens everywhere within our solar system, but a equally proportionate total eclipse is a strange coincidence that is only relatively recent in astronomical terms. Does that happen on Nova Mondial, though? Statistically, it's unlikely, but I think for story purposes, I think it would work well.

As for time measuring, I think as none of us had made contact yet, as long as we don't go too far advanced or populated than anyone else, I think the rate of events isn't that crucial for now. We should be able to adapt it when contact is established, though. I have been going by days, but after Darbu's storyline, I'm planning a significant jump.