The title of Bayer Star is named after the English name Vega, which means the queen of summer night. The traditional name Vega, early Wega, comes from the loose transliteration of Arabic word wāqi, which means "falling" and "landing". Vega can often be seen in the summer evening near the zenith in the middle and high latitudes in the northern hemisphere.
The Chinese name Weaver Girl (Seven Fairys) is generally the seventh daughter of the Jade Emperor in China mythology (controversial). There are many versions of China myth. From the south-central latitudes, winter can be seen above the northern horizon of the southern hemisphere. At declination +38.78, Vega can only watch at 51s north latitude.
Physical measurement Vega is the brightest star in Lyra (Alpha Lyra) and the fifth brightest star in the whole day, 25.3 light years away from the Earth. Because the apparent magnitude of Vega is close to zero, many professional astronomers will use Vega as the standard for photometric determination.
By condensing the hydrogen in the core into helium, it gives off light and heat. In addition, the mass of Vega is 2.5 times that of the sun. The higher the mass of a star, the faster it consumes fuel, and the energy released per second is equivalent to 50 times that of the sun. Therefore, the life span of Vega is only 65.438 billion years, which is one tenth of the life span of the sun. It is determined that Vega rotates once every 12.5 hours, the whole star is flat, and the equatorial diameter ratio is 23%.
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