I’m back from a short vacation in southern California, most of which was unrelated to astronomy, but we spent a couple of days in Borrego Springs, which is a designated Dark Sky Community.  It’s also in the middle of the Anza-Borrego Desert State Park, which recently became a Dark Sky Park.  Using what is called a Sky Quality Meter (I call it a “dark meter” – sort of the opposite of a light meter) I got readings of 21.1 to 21.3 around town.  That’s close to the darkness at most of the dark sky sites I go to in the […]