David H Levy Guide to the Stars Author:Ken Graun, David H. Levy This 11-inch diameter circular star chart is a convenient reference tool to help find the constellations. You simply "dial-in" your observing time and date to find the visible constellations. Usable for latitudes 30° to 60° north which covers the US and Canada. Includes yearly meteor showers table, factual information on the planets, and summer/... more »winter constellation tours. Over 26 binocular/small telescope objects are indicated. Website supported for up-to-date information on happenings in the night sky including which planets are visible. Compact size makes it ideal for travel. Also available in a larger, 16-inch diameter size which is easy to read and ideal for families, teachers and seniors. The larger size also has more astronomy information on the back.« less