This deck of 48 cards presents a concise and highly informative look at 47 star groups. Each card has a chart of a constellation on the front, its position and area, its brightest star, and number of visible constituent stars, with notes about the constellation's origin and history. For example, what the Greeks saw as Cancer, the crab, was Scarabaeus, the beetle, to the Egyptians. The forty-eighth card has a glossary of astronomical terms on the front and general information about the heavens on the back. These cards are a great way to learn how to navigate the night sky.