Mk constellation

Analysis: What constellation is Cowherd and Weaver Girl?

Cowherd and Weaver Girl are not only fairy tales I heard when I was a child, but also stars in the sky. Probably people make up stories according to constellations. Do you also like the story of the Cowherd and the Weaver Girl? Do you know their constellations? Let's see what constellation the Cowherd and the Weaver Girl are.

The official name of Altair in China is Heguji; It combines with several other stars to form a constellation called Skyhawk. The official name of Vega in China is Vega I; It and several other stars form a constellation called Lyra. The names and divisions of constellations were introduced from the west.

Vega, or Alpha Lyra, is called Vega for short in China folk and astronomical circles. It is the brightest star in the northern hemisphere, second only to the large focal length, and also the brightest early star in the northern hemisphere. Although it has been the standard star for photoelectric photometry and MK spectral classification since 1953, many years of photometric research show that it is a variable star, and the difference between blue and yellow bands is 0.08 magnitude. However, the classification and darkening law of its variable stars need further discussion. In addition, its apparent speed has also changed significantly.

The spectral classification of Vega is that A0V is earlier than Sirius A's A 1V, but its surface effective temperature of 9.660k is lower than the latter's 9.970k, and its radius is slightly larger than that of typical A0V star. It can be seen that the evolution of Vega seems to have been divorced from the original main sequence. Soft X-rays from Vega have been discovered by exploration rocket and high-energy observation satellite 1. The research published in 1979 shows that the X-ray luminosity of 0. 15~0.08 kev is about 0.3× 1029 erg per second (the luminosity of the sun in the same wave band is less than 0.0 1× 65438 per second).

Altair and Vega are two stars like the sun, and they can also glow by themselves. Altair and Vega are far away from us! Altair 16 light years, Vega 27 light years. The distance between them is also very far, which is 16 light years.