Question: How reliable are published sunrise/sunset times? I've been using an online calendar in my daily posts (set to Manchester)but I bought a weather station and the times shown on that differ by a few minutes (also set to Manchester). Looking around, some other online sources differ a little, but not as much. I'm guessing the time depends on the exact location of the viewpoint from which it's taken.
I don't need an exact time, it's just for interest, but I'd like to follow one source!
