Al-Sufi's 5th star of Virgo is Flamsteed 63 Virginis. Al-Sufi says it is a double star of the 5th magnitude. In Al-Sufi's time it formed a "naked-eye double" with 61 Virginis, but owing to large proper motion, 61 has now moved about 26 minutes of arc towards the south, and no longer forms a double with 63. This interesting fact was first pointed out by Flammarion in his work _Les Étoiles_ (p. 373). Libra, the Balance, is one of the "signs" of the Zodiac, but originally formed the claws of the Scorpion. It was called Juguna by Cicero, and Mochos by Ampelius. The Greek name was φαρμουθε. Virgil suggests that it represented the justice of the emperor Augustus, honoured by the name of a constellation; but probably this refers to the birth of Augustus under the sign of Libra, as Scaliger has pointed out. According to Brown, "the daily seizing of the dying western sun by the claws of the Scorpion of darkness is reduplicated annually at the Autumnal Equinox, when the feeble waning sun of shortening days falls ever earlier into his enemy's grasp;"[414] and he says, "The Balance or Scales (Libra), which it will be observed is in itself neither diurnal nor nocturnal, is the only one of the zodiacal signs not Euphratean in origin, having been imported from Egypt and representing originally the balance of the sun at the horizon between the upper and under worlds; and secondarily the equality of the days and nights at the equinox."[415] According to Houzeau, Libra was formed at the beginning of the second century B.C., and it does not appear in any writings before those of Geminus and Varron.[416] Milton says in _Paradise Lost_:-- "The Eternal to prevent such horrid fray, Hung forth in heaven his golden scales, yet seen Betwixt Astræa and the Scorpion's sign." (Here Astræa is Virgo.) It is worth noticing that both Ptolemy and Al-Sufi rated the star κ Libræ as two magnitudes brighter than λ Libræ. The two stars are now practically of equal brightness (5th magnitude), and it seems impossible to believe that this could have been the case in Al-Sufi's time. Surely a careful observer like Al-Sufi, who estimated the relative brightness of stars to a third of a magnitude, could not possibly have made an error of two magnitudes in the brightness of two stars near each other! It should be stated, however, that κ Libræ was rated 5th magnitude by Argelander and Heis, and λ, 6th magnitude by the same excellent observers. The next "sign" of the Zodiac, Scorpion, was consecrated by the Romans to Mars, and by the Egyptians to Typhon.[417] It was called _Nepa_ by Cicero, _Martis sidus_ by Manilius, and _Fera magna_ by Aratus. The Greek name was παχων.