Among the circumpolar constellations we must now speak of Cassiopeia, or the Chair—or Throne—which is situated on the opposite side of the Pole from the Great Bear; and which is easily found by joining its star δ to the Pole and continuing it. The Chair is composed principally of five stars, of the third magnitude, arranged in the form of an M. A smaller star of the fourth magnitude completes the square formed by the three β, α, and γ. The figure thus formed has a fair resemblance to a chair or throne, δ and ε forming the back; and hence the justification for its popular name. The other name Cassiopeia has its connection and meaning unknown.
We may suitably remark in this place, with Arago, that no precise drawing of the ancient constellations has come down to us. We only know their forms by written descriptions, and these often very short and meagre. A verbal description can never take the place of a drawing, especially if it is a complex figure, so that there is a certain amount of doubt as to the true form, position, and arrangement of the figures of men, beasts, and inanimate objects which composed the star-groups of the Grecian astronomers—so that unexpected difficulties attend the attempt to reproduce them on our modern spheres. Add to this that alterations have been avowedly introduced by the ancient astronomers themselves, among others by Ptolemy, especially in those given by Hipparchus. Ptolemy says he determined to make these changes because it was necessary to give a better proportion to the figures, and to adapt them better to the real positions of the stars. Thus in the constellation of the Virgin, as drawn by Hipparchus, certain stars corresponded to the shoulders; but Ptolemy placed them in the sides, so as to make the figure a more beautiful one. The result is that modern designers give scope to their imagination rather than consult the descriptions of the Greeks. Cassiopeia, Cepheus, Andromeda, and Perseus holding in his hand the Head of Medusa, appear to have been established at the same epoch, no doubt subsequently to the Great Bear. They form one family, placed together in one part of the heavens, and associated in one drama; the ardent Perseus delivering the unfortunate Andromeda, daughter of Cepheus and Cassiopeia. We can never be sure, however, whether the constellations suggested the fable, or the fable the constellations: the former may only mean that Perseus, rising before Andromeda, seems to deliver it from the Night and from the constellation of the Whale. The Head of Medusa, a celebrated woman, that Perseus cut off and holds in his hand, is said by Volney to be only the head of the constellation Virgo, which passes beneath the horizon precisely as the Perseus rises, and the serpents which surround it are Ophiucus and the polar Dragon, which then occupies the zenith.
Either way, we have no account of the origin of the names, and it is possible that we may have to seek it, if ever we find it, from other sources—for it would appear that similar names were used for the same constellations by the Indians. This seems inevitably proved by what is related by Wilford (Asiatic Researches, III.) of his conversation with his pundit, an astronomer, on the names of the Indian constellations. "Asking him," he says, "to show me in the heavens the constellation of Antarmada, he immediately pointed to Andromeda, though I had not given him any information about it beforehand. He afterwards brought me a very rare and curious work in Sanscrit, which contained a chapter devoted to Upanacchatras, or extra-zodiacal constellations, with drawings of Capuja (Cepheus), and of Casyapi (Cassiopeia) seated and holding a lotus flower in her hand, of Antarmada charmed with the fish beside her, and last of Parasiea (Perseus) who, according to the explanation of the book, held the head of a monster which he had slain in combat; blood was dropping from it, and for hair it had snakes." As the stars composing a constellation have often very little connection with the figure they are supposed to form, when we find the same set of stars called by the same name by two different nations, as was the case, for instance, in some of the Indian names of constellations among the Americans, it is a proof that one of the nations copied it from the other, or that both have copied from a common source. So in the case before us, we cannot think these similar names have arisen independently, but must conclude that the Grecian was borrowed from the Indian.
Another well-known constellation in this neighbourhood, forming an isosceles triangle with Arcturus and the Pole Star, is the Lyre. Lucian of Samosatus says that the Greeks gave this name to the constellation to do honour to the Lyre of Orpheus. Another possible explanation is this. The word for lyre in Greek (χέλυς) and in Latin (testudo) means also a tortoise. Now at the time when this name was imposed the chief star in the Lyre may have been very near to the pole of the heavens and therefore have had a very slow motion, and hence it might have been named the tortoise, and this in Greek would easily be interpreted into lyre instead. Indeed this double meaning of the word seems certainly to have given rise to the fable of Mercury having constructed a lyre out of the back of a tortoise. Circling round the pole of the ecliptic, and formed by a sinuous line of stars passing round from the Great Bear to the Lyre, is the Dragon, which owes its name to its form. Its importance is derived from its relation to the ecliptic, the pole of which is determined by reference to the stars of the first coil of the body. The centre of the zodiacal circle is a very important point, that circle being traced on the most ancient spheres, and probably being noticed even before the pole of the heavens.
Closely associated with the Dragon both in mythology and in the celestial sphere is Hercules. He is always drawn kneeling; in fact, the constellation is rather a man in a kneeling posture than any particular man. The poets called it Engonasis with reference to this, which is too melancholy or lowly a position than would agree well with the valiant hero of mythology. There is a story related by Æschylus about the stones in the Champ des Cailloux, between Marseilles and the embouchure of the Rhône, to the effect that Hercules, being amongst the Ligurians, found it necessary to fight with them; but he had no more missiles to throw; when Jupiter, touched by the danger of his son, sent a rain of round stones, with which Hercules repulsed his enemies. The Engonasis is thus considered by some to represent him bending down to pick up the stones. Posidonius remarks that it was a pity Jupiter did not rain the stones on the Ligurians at once, without giving Hercules the trouble to pick them up.
Ophiucus, which comes close by, simply means the man that holds the serpent ὀϕι-οῦχος.
It is obviously impossible to know the origins of all the names, as those we now use are only the surviving ones of several that from time to time have been applied to the various constellations according to their temporary association with the local legends. The prominent ones are favoured with quite a crowd of names. We need only cite a few. Hercules, for instance, has been called Ὀκάλζων Κορυνήτης, Engonasis, Ingeniculus, Nessus, Thamyris, Desanes, Maceris, Almannus, Al-chete, &c. The Swan has the names of Κύκνος, Ἴκτιν, Ὄρνις, Olar, Helenæ genitor, Ales Jovis, Ledæus, Milvus, Gallina, The Cross, while the Coachman has been Ἱππιλατης, Ἐλαστίππος, Αἰρωηλατης, Ἤνιοχος, Auriga, Acator, Hemochus, Erichthonus, Mamsek, Alánat, Athaiot, Alatod, &c. With respect to the Coachman, in some old maps he is drawn with a whip in his left hand turned towards the chariot, and is called the charioteer. No doubt its proximity to the former constellation has acquired for it its name. The last we need mention, as of any celebrity, is that of Orion, which is situated on the equator, which runs exactly through its midst. Regel forms its left foot, and the Hare serves for a footstool to the right foot of the hero. Three magnificent stars in the centre of the quadrilateral, which lie in one straight line are called the Rake, or the Three Kings, or the Staff of Jacob, or the Belt. These names have an obvious origin; but the meaning of Orion itself is more doubtful. In the Grecian sphere it is written Ὠρίων, which also means a kind of bird. The allied word ὦρος has very numerous meanings, the only one of which that could be conjectured to be connected with the constellations is a "guardian." The word ἵριον, on the contrary, the diminutive of ὥρος, means a limit, and has been assigned to Jupiter; and in this case may have reference to the constellation being situated on the confines of the two hemispheres. In mythology Orion was an intrepid hunter of enormous size. He was the same personage as Orus, Arion, the Minotaur, and Nimrod, and afterwards became Saturn. Orion is called Tsan in Chinese, which signifies three, and corresponds to the three kings.
Fig. 6.