Traditional Culture Encyclopedia - Photography major - How to identify which constellation is Aquarius in the night sky?
How to identify which constellation is Aquarius in the night sky?
The "Autumn Quadrangle" is the most eye-catching symbol in the autumn starry sky. See the picture on the left above. The Autumn Quadrangle is composed of the three stars α, β, and γ in Pegasus and the α star in Andromeda. Nearly square, Pegasus and Andromeda are very important constellations in the autumn sky. Among the four stars that form the quadrilateral, except for γ Pegasus, which is a 3rd magnitude star, the other three stars are all 2nd magnitude stars, making them very easy to identify. . On autumn nights, when Pegasus rises to the zenith, this large quadrilateral is located due south near the zenith, and the four sides of the quadrilateral indicate the east-west and north-south directions. Therefore, it can not only be used to locate the direction, but also pass through It looks for other constellations.
For example, you can find Polaris by extending the line connecting γ Pegasus and Alpha Andromeda to the north to four times the distance; In the low-latitude south of my country, Polaris is located very low in the sky and is difficult to find, or even invisible at all. Therefore, it is very practical to find Polaris and identify the direction through the autumn quadrilateral.
The line connecting the β of Pegasus to the α star extends southward to one and a half times farther. There is a large area of ??relatively faint stars. This is the constellation Aquarius. To the north of the constellation, along the ecliptic, to the east is Pisces and to the west is Capricorn. Aquarius is an equatorial constellation. Its center is at 22:40 right ascension and -13 degrees declination. It occupies an area of ??980 square degrees and is between 315 degrees and 345 degrees longitude. There are 113 stars brighter than the sixth magnitude in Aquarius. Among them, the brighter ones include 2 3rd magnitude stars and 13 4th magnitude stars; it is said that the gods of Olympus often hold grand banquets in the palace of Zeus. The daughter of Zeus, the beautiful princess Hebe, is carrying a vase. Pouring wine for the gods, she could no longer do this job after getting married, so Zeus thought of finding a suitable person in the world to replace his daughter Hebe. So Zeus turned into an eagle and went to the world to carry back the beautiful young man Ganymede, and served the gods in the palace of Olympus on his daughter's behalf. Aquarius in the starry sky is the bottle from which Hebe and Ganymede poured wine for the gods. In the picture, the α and β stars of Aquarius are the shoulders of the young Ganymede, and the "M" shape is the wine bottle, with two streams of nectar flowing out from the mouth of the bottle.
Every year between January 27th and March 13th, the sun is in this constellation, and Aquarius rises and sets at the same time as the sun. Therefore, Aquarius is invisible in February and March, and appears before dawn in April. It is low in the east, and then rises earlier and earlier. It is visible in the middle of the night in June, and basically visible all night in August. After the sun goes down, Aquarius rises from the east, passes through the zenith, and sets in the west at dawn. ; Later, as the rising time advanced, Aquarius was already hanging high in the zenith when the sun set in October. By December, Aquarius set from the west at midnight, and in January, it appeared in the west after dark. Low altitude, visible for a very short time.
Aquarius is a zodiac constellation, so the nine planets of the solar system will appear here. From now to 2007, Uranus has been moving in Aquarius;
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