When you go outside and see a bright light shining in the sky it's usually pretty easy to figure out where the light is coming from, especially during the day when the source of the light is the sun, aka that thing burning your retinas.
But if you keep staring at the night sky wondering what all those lights are out there you may be dealing with a possible alien abduction scenario, in which case you should stop reading and start hiding!
Everyone else who is curious about the lights they see in the sky should consult this flowchart by The League Of Lost Causes and figure out if that light is a meteor or a comet or an international space station.
-Via Lifehacker