Sirius

Sirius is a double star system in the Big Dog constellation. At first glance it does not look like a single star, but it consists of two stars called Sirius-A and Sirius-B.

The Sirius double star system is two of the eight stars closest to our system with a distance of 8.6 light years to the Sun. The age of the system is estimated to be between 200 million and 300 million. It is possible that the Sirius system has become one of the stars we have seen today, by finishing the fuel of one of the star pairs, first becoming a red giant and then collapsing into itself, transforming into the present white dwarf. This process is thought to have been completed approximately 120 million years ago. Today, the white dwarf is called Sirius-B.

Sirius-A is twice the mass of the Sun and about twenty three times the light intensity. The surface temperature is ten thousand kelvin and the diameter is 2,366,400 km. It is ten thousand times brighter than his wife who has consumed all the fuel and returned to the white dwarf.

Sirius-A does not have swelling in the equatorial region due to a rotation speed of less than 16 km / h. This speed of rotation around itself is too slow to cause flattening. The analysis of the various methods used reveals that the star Sirius-A will complete its life approximately one billion years later and will turn into a red giant and then a white dwarf like his wife. Furthermore, as a result of the spectral analysis, it was determined that the elements of heavier iron such as the helium of the second order in the fuel cycle of the star are at a level that can be counted intensively. Compared to the sun, this rate is almost three times higher.

Sirius-B is slightly smaller in volume than Earth, but the mass is almost solar. Due to its extremely small size and the brightness of his wife Sirius-A, it is very difficult to see even with very strong and modern telescopes. The surface temperature is approximately 25,000 Kelvin. But, unlike his wife, he has been in the process of cooling down since the white dwarf, since he has completed his life. Sirius-B is the first white dwarf to be discovered and almost twice the size of normal white dwarfs. This star with a diameter of 12,000 km is about 300 times more than the surface hardness of the star. Shooting power is 350,000 times more than Earth's attractive power.

The apparent brightness of Sirius-A, the brightest star in the sky, is -1.47. From the solar system it is twice as brighter than the brightest second star. The Earth can be seen from anywhere except near the north pole regions. It is very difficult to see Sirius-B during periods when they are close to each other, because of the brilliance of their spouse and the fact that they are small. The last incarnations took place in 1994, and the star pairs are now in the process of moving away from each other. For this reason, the dwarf white mare's visibility is increasing.

The stars of Sirius, Procyon and Betelgeuse are the corners of the imaginary triangle located on the northern half of the wing, which is called the winter triangle by astronomers

Sirius is located in the Great Dog constellation, Procyon, in the Little Dog constellation, and the red giant Betelgeuse in the Aviator constellation. It is most convenient to follow and use the Hunter Constellation to detect the Sirius pair.