libra(Latin: Libra, astronomical symbol♎）yesZodiacThe best observation time is from September 23 to October 23.be locatedVirgoTo the southeast of.The four brightest 3m stars α, β, γ and σ in the constellation form a quadrangle, and the β star and the spring triangle form a big diamond.The visible latitude is between+65 ° and − 90 °.[1]
The stars of Libra have been recognized since ancient times, but not Ptolemy as an independent constellation.In Ptolemy, the stars of Libra belong toscorpioLibra alpha is the northern claw of Scorpio, and Libra beta is the southern claw of Scorpio.RomanIt was not until Caesar's time in the first century AD that it was discovered that when the sun moved to this constellation, the day and night were evenly dividedthe autumnal equinoxBefore and after, so it is marked out independently.
Because the earthprecession of the equinoxesThe autumnal equinox has moved to the westVirgo。[2]Generally speaking, the sun moves in Libra from November 1 to November 23 every year.
Libra alpha（Zubenelgenubi ）Zubenelgenubi (South Claw), a visual binary star, is composed of α 1 with brightness of 5.2 and α 2 with brightness of 2.8, which is blue and white.
Libra was once located in the ancient Chinese constellation Di.
Libra β（Dizuosi）Zubeneschamali (North Claw), a blue dwarf star with a spectral classification of B8 and an apparent magnitude of 2.6, may be the only green star visible to the naked eye.
Libra σ（Zhe Wei Qi）, Zubenelakrab (scorpion's claw), eclipsing variable star.Although σ is in Libra, not on the boundary of Libra, it was previously known as gamma scorpio, and it did not become a star in Libra until 1851.
Libra μ (Dizuo increased by 5), composed of two stars with brightness of 5.7 and 6.7fixed starConsists of.
Libra I (Di 2) is a complex star, which is 4.5 stars to the naked eye.[1]
Major deep space objects
number
type
remarks
NGC 5897
Globular cluster
NGC 5897
The apparent magnitude is low and can be seen slightly with a 20cm telescope[1]
NGC 5898
Galaxy
Discovered by astronomer William Herschel
NGC 5885
Galaxy
Discovered by astronomer William Herschel
Myth and legend
Announce
edit
JupiterZeusThere are countless wives and therefore countless children.The Goddess of Justice Estelle is Zeus andthemis The daughter of Zeus and all the gods in the temple regard her as the apple of their eyes, but she is very independent, determined and enthusiastic, and has her own thoughts.God of the SeaPoseidonIt is the second generation king and queen of godsCronusAnd Rhea's fifth child, the PlutoHadesHis brother, the king of godsZeusMy brother, he is as deep and cold as the sea.
Human beings are very smart. They gradually learn to build houses and pave roads, but at the same time, they also learn to fight and cheat.War and evil began to spread in the world. Many gods could not bear it and returned to live in the sky. Only the goddess of justice, Themis, and the sea god Poseidon remained.The goddess did not despair of human beings. She believed that human beings would one day awaken and return to the good and pure nature of the past.However, the sea god lost confidence in human beings and advised the goddess to return to heaven.The goddess naturally refused to listen, so they quarreled for the first time in their lives.Their dispute is very fierce and escalates from human issues.The Goddess of Justice despised the sea god as a pool of salt water (the sea water is salty), while the sea god revealed the scandal of Zeus and the fact that the goddess had an illegitimate life.
Themis and Poseidon to the god king Zeus and the god queenHeraAccording to the judgment, Hera suggested that the two people compete to see who can make people feel more peaceful and apologize to each other if they lose.Hera is partial to Poseidon and jealous of the goddess of justice, Themis. She knows that water is the source of life and will certainly make human beings feel peaceful.
The competition will be held in the square of the Tianting, starting with Poseidon.When the sea god waved towards the wall, beautiful water flowed out of the crack. It was crystal clear, making people feel infinitely cool and comfortable after seeing it.At this time, the Goddess of Justice became a tree. The tree had a reddish brown trunk, green leaves and golden olives. Anyone who saw it felt love and peace.The sea god smiled at the goddess. He knew that the goddess's wish had finally come true.Humans then realized the importance of peace, and the goddess and the sea god were as good as ever. In order to commemorate this result, Zeus threw the scales he took with him into the sky, and there was Libra.
Another legend says that Libra is the balance in charge of good and evil in the hands of the priestesses in Greek mythology, which flew to the sky and became Libra.About 2000 BC, this constellation was related to the trial of Babylonian religion dominating life and death, because the balance was used to measure the good and evil of the soul in mythology.[3-4]
