Monday, May 26, 2008
Okay, so maybe everyone already knows about dusk, but I need a definition as I frequent national and state parks which say that they will close at dusk and impound your car if you leave it there after dusk. I am always afraid about my car, so a definition is necessary. So the definition: Dusk is the twilight after sunset, when the sun is 6 degrees below the horizon. At this time objects are still visible and some stars and planets are also visible. Dusk is not the same as sunset, which is right when the disc of the sun disappears below the horizon.
There you go, so if I can just figure out how many degrees below the horizon the sun is, I'll know when I will get kicked out of the park!