Which constellation is Vega in? Where is the celestial sphere?

Speaking of Vega, everyone is familiar with this fairy tale that is well known in China. On Valentine's Day in China, Cowherd and Weaver Girl will meet on the bridge. But beyond fairy tales, in the starry sky at night, there is an perseverance called Vega, which is really far away from Altair. These two stars span almost the whole galaxy.

Which constellation is Vega in?

Vega belongs to Lyra. Vega is the brightest star in Lyra, ranking fifth in the night sky and the second brightest star in the northern hemisphere, second only to arcturus. Like Sirius and arcturus, it is one of the brightest stars near the sun, about 25 light-years away from the Earth. In summer in the northern hemisphere, most observers can see Vega with naked eyes near the zenith. Because of precession, Vega was the north star in the northern hemisphere around BC 12000, and will become the north star again in AD 14000, when the declination will reach +86 14', and it is actually a star very close to the earth.

Vega's celestial position

Vega and the stars of Lyra together form the appearance of Lyra, hence the name Lyra. To see Vega, it is best to be in the mid-latitude area of the northern hemisphere on summer nights. Vega often appears near the zenith. For the mid-latitude areas in the southern hemisphere in winter, Vega usually hangs on the northern horizon. In the area north of 5 1 N, Vega has been on the horizon and has become an arch star. Vega will pass through the zenith meridian around midnight on July 1 every year, so it can appear at the zenith and be observed by people.

The Observation History of Vega

Astronomy and the observation of Vega have a lot of history, but it is also a bright star in the night sky. Some people even call it "the second most important star in the sky, second only to the sun". Vega is the first star photographed by human beings outside the sun. Vega is an ellipsoid star with a pale pink north pole and a blue equator. Because of its fast rotation speed (Vega rotates once every 12.5 hours), the whole star is flat, and there are four small stars around Vega.

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