A star chart that allows you to easily check the position of constellations. I received it from Yotsuya Otsuka. It's in good condition. I used it at cram school. It's simpler and easier to use than the ones used at school. 1) The colors of the stars are classified. 2) Constellation guide lines are included. 3) Constellation lines are identified. I have stored it in its original bag. The bag is creased in places, but the contents are in good condition. #StarChart