Such a comprehensive reply. I don't really care if the globe is sphere or flat. I heard about the moon landing, and of course many of those things and battle between their respective believers. I don't need to question NASA, I'm just enjoying space. Like in the night time when the sky is clear, I can see the moon with my bear eyes better than a cheap telescope. I have a lot of crazy thinking in my mind, like what if we live in mars, do we shorten our life there? Or we live more days in earth time. When we come back form Mars, are we physically stay young or the people on the earth grow old because earth time passing faster?

On the other hand, I also like to see the moon in the morning when sun is rising, the sky is still dark blue and I can still see the moon.

Oh and the P900 you mentioned, I just checked YouTube. It's indeed a brilliant piece of machine!