Quote Originally Posted by Gilrandir View Post
Perhaps there were other sources of light:
[...]

On a more serious note, the light referred to in Genesis might have been sourceless (just like when it it arleady light in the early morning but there's no dawn yet), and later it was embodied into a special container aka the Sun.
That is an enormous stretch given that the sun is the light that defines what a day and a night are since humans invented the term. There is absolutely zero mention of another light/energy source and then you have the earth basically having been created before the star that it orbits, so there must have been a lot of changes and fine-tuning going on when it says for every day that "it was good" as in no further changes required.

Quote Originally Posted by Fragony View Post
How can it be time if that's different on another planet when it's dark or light because they can be further away or closer, and have their own rules that don't comply with our 24 hour system we call time. We already know that planets move at different speeds depending on their mass and distance, time is an earth-thingie that says abolutily nothing
Sorry, but that is a non-argument, you are confusing the concept of time with our reference system for the measurement of time.
Of course there is time on other planets, the same time even. Unless you are talking about the minuscule differences in time measurement the closer one gets to the speed of light, in which case you might as well say time doesn't exit anywhere.

One of the basic foundations of astrophysics or physics in general is the idea that the physical rules we can observe are valid everywhere and at any point in time in the known universe. If a different planet had completely different physics then you'd have to prove that first, so far everything points to that not being the case. The reason we know other planets have different speeds and sizes is that we apply these universal rules to our observations.
If you seriously want to say other planets can have different physical rules and different rules of time, then we can't even know that extra-solar planets exist.