To find Pegasus take the star chart out-of-doors, say some evening in November about 9 o’clock, for the Great Square will then be on the _meridian_, that is, on a line passing over your head and which runs north and south across the sky. This time, instead of looking down on the chart, as you did in finding the Big Dipper and Cassiopeia, turn the board bottom side up, as shown in Fig. 18, but still keeping the cardboard North Star pointing north and the four stars of Pegasus pointing toward the south. By looking over your chart into the sky and following an imaginary line with your eye from the North Star through Cassiopeia past the star β (beta) and lengthening this line toward the equator in the southern sky you will come upon four bright, white stars which form the Great Square of Pegasus and you have added another and fourth constellation to your list. The practical value of knowing the mighty constellation of Pegasus is that you can always find the north, by means of its friendly stars, though the North Star, the Big and Little Dippers and Cassiopeia are hidden by clouds. To find the north you only have to wait until Pegasus gets very high in the sky and run an imaginary line through the pointer stars of Pegasus and produce it until it reaches the northern horizon. [Illustration: FIG. 18.—HOLDING THE CHART OF PEGASUS OVERHEAD.] The Great Square of Pegasus was fancifully pictured by the ancients as a _Flying Horse_ and, curiously enough, with only half a body at that, as shown in Fig. 19. To those who do not know the lore of the stars it is not so easy to see in the Great Square the fabled winged steed who still continues his flight through the sky just as he did when he was invented over four thousand years ago. [Illustration: FIG. 19.—THE FLYING HORSE OF PEGASUS.] [Illustration: FIG. 20.—FIGURE OF A TRAPEZIUM.] =The Mighty Orion.=—The brightest constellation in the whole sky is _Orion_ (pronounced O-ri´-on), the Great Hunter, as the ancients liked to imagine this group of stars. With the exception of the Big Dipper, Orion is the easiest of all the constellations to find provided you look for it at the right time of the year, which is during the winter months. To locate Orion cut out of cardboard seven large stars and three small stars. Near the lower edge of the blackened cardboard pin two large and two small stars to form what is called a _trapezium_, that is, four straight lines forming a figure, none of which are parallel, as shown in Fig. 20. About halfway across the figure pin three large stars in a row, at equal distances apart and tilted a little, as shown in Fig. 21. [Illustration: FIG. 21.—CONSTELLATION OF ORION.] [Illustration: FIG. 22.—ORION THE MIGHTY HUNTER.]