#4: Everything on your sky charts is shifted compared to your compass labels. Am I doing something wrong?

Sky Lights was originally written primarily for Arizona skies. Now that Sky Lights is online with readers from other locations, that can cause a problem with some sky charts. There are several websites that can compute your exact sky map for any location. See, for example: http://space.jpl.nasa.gov/. But there’s a simple correction you can make to my charts, as long as you know your latitude.

Arizona is at a latitude of 34° north of the Equator. If you’re at latitude 44°, 10° farther north than Arizona, everything in my charts will be shifted 10° south. If you are at latitude 24°, 10° farther south than Arizona, everything in my charts will be shifted 10° north.

Whatever your location, posted clock times will be correct for most celestial events. Check the Local Time & UT page on this website. Sunset times, however, will vary depending on your latitude. Here’s one of many online sunset/sunrise time calculators: http://www.calendar-updates.com/sun.asp. All you have to do is enter your postal code.