Sky & Telescope's Star Wheel 30 North All-sky map that's good anytime throughout the year Features S&amp;T's iconic monthly star chart, replotted as a planisphere complete with accurately marked star brightnesses and locations of famous deep-sky objects. Back offers a companion chart that shows a less distorted view of the sky to the south. Full-color planisphere is easy to read in daylight or at night under a red flashlight, and even accommodates daylight-savings time.