How as an individual can I know if the Earth is a sphere or a flat disc? What experiment can I do that doesn't involve trusting information from a 3rd party that would prove what the geometry really is?
http://i.imgur.com/1FL8pEp.jpgGo to a church, ask them what they believe. The truth is usually the opposite.
For heaven's sake, what does this have to do with Christianity or any church? Some of your folks just look for any flimsy excuse to attack religion.
Anyway, back to the original post. Why would you even need to verify what is already well known. If you're so adamant about not adopting information from a third party, why ask then for our opinion? Y'all keep raising an argument that was torn down centuries ago. Seasons and climates are very simple phenomena that tell us of the spherical nature of the earth. You might wanna become an astronaut anyway to be very sure. In this case, I doubt if it's not already too late for you.