(January 16, 2013 at 3:08 am)Christian Wrote: Do you try to prove to others that the Sun/moon/stars exists? I guess no.Actually yes!
You prove it by showing people that they are in the sky at a specific time of day. They just need to use their own eyes to acknowledge that fact....
if what they're seeing is just a sheet with some white dots painted on, or a real sky with stars.... well, that requires some other tools, but they end up in the visual department.