One of the four you know already; and that is the Great Bear--sometimes named “The Plough,” and “Charles’ Wain.” Perhaps the seven stars are in shape at least as much like to a plough, or to a wagon or a dipper, as they are to a bear. Away to quite the other side of the Pole-Star, and about opposite to the Great Bear, is a constellation named Cassiopeia. Here we find five bright stars shaped somewhat like an easy-chair seen sideways. There are no first-magnitude stars in either the Great Bear or Cassiopeia. The two other important constellations are on the two other sides of the Pole-Star; making with the Great Bear and Cassiopeia a sort of rough square of four Star-Groups, having the Pole-Star in their centre. One of the two is the Constellation Lyra; and in Lyra shines the beautiful first-magnitude star, VEGA. Opposite to Lyra, on the other side of the Pole-Star, is the Constellation Auriga; and here we come across another first-magnitude star, the giant-sun, CAPELLA. A certain well-known constellation, Draco, or The Dragon, winds among these stars-groups, passing between the Great Bear and the Little Bear, and so lying very near the Pole-Star. From the above-named four principal star-groups you may work your way southward in all directions, learning one constellation after another. I can now only point out a very few more. At no great distance from the Great Bear and from Lyra is a constellation called Boötes; and in this group is found the bright first-magnitude star, ARCTURUS; that giant-sun of which you have heard before. At no great distance from Auriga--that is, right away in the opposite direction from Boötes--you may note in winter months the gentle shining of the PLEIADES--a star-cluster in the constellation Taurus. During the winter, as you know, certain star-groups come into view which in summer we cannot see. No doubt you will remember that Taurus is one of those star-groups against which the Sun is seen, seemingly, to pass in the course of the year. But when you can see the Pleiades you will be sure that the Sun is not _then_ between us and Taurus. If he were, Taurus would be above the horizon at the same time as the Sun. And in that case, of course, we could not see Taurus at all, or the Pleiades. In this same star-group Taurus, is a bright first-magnitude star named ALDEBARAN. When you have found the Pleiades you are not far from the grandest star-group in the sky, the magnificent constellation of Orion. In Orion there are two first-magnitude stars, named RIGEL and BETELGEUSE, and many other bright stars also. The two feet-stars of Orion point in almost a straight line to the very brightest star in the whole sky, SIRIUS; often called “The Dog-Star,” because it is in the constellation Canis Major, or The Great Dog. Arcturus and Capella and Vega are brightest of all stars in the northern half of the sky; for Sirius is in the southern half. But not one of them shines as Sirius shines.