Not all planes, look into the ones that have routes going parallel to the horizon(east to west or west to east), the key is a route/flight-path that passes between a population center and the sun...
But as I said, not all planes, private planes also used and also some military, probably fewer airliners/commercial routes/flights now than in the past, likely specific companies rather than all companies....
Not all planes, look into the ones that have routes going parallel to the horizon(east to west or west to east), the key is a route/flight-path that passes between a population center and the sun...
But as I said, not all planes, private planes also used and also some military, probably fewer airliners/commercial routes/flights now than in the past, likely specific companies rather than all companies....