If You Have Ever Looked Up At The Sky,

and wonder what that bright light is,

 here is a flow chart to tell you what you are looking at, now here is a tip, if it is the day time and it is very, very bright and you look at it intensely for an hour or so and you go blind for life, it was probably the sun, and if you are not sure what a bolide is have a look here at the Woods Hole Coastal and Marine Science Centre site take on one,

and checking back to The League Of Lost Causes, I have just noticed that some one has very kindly translated the chart into Norwegian.