Pisces is not the best constellation in the constellation!

I am Pisces .. Some people say that Pisces has all the characteristics of the twelve constellations .. and it is the best among the constellations. ..

Pisces is also the zodiac sign, but it is darker than Capricorn, and the brightest star is only 4 m.

From the star map, these stars in Pisces are located in the south of the quadrangle in autumn, which can be regarded as a fish (western fish), and the dark star where the quadrangle pegasus beta meets Andromeda alpha is another fish (northern fish). The "V" between two fish, whose vertex is Alpha Star, is the rope that binds them together.

On the celestial sphere, there are two intersections between the ecliptic and the celestial equator. The intersection formed by the intersection of the ecliptic from the south of the celestial equator from west to east and the north of the celestial equator is called the "vernal equinox" in astronomy, which is of great significance in astronomy. At present, this important "spring equinox" is in Pisces.

Pisces has discovered a new black hole with the mass equivalent to 10,000 suns.

International Online News American astronomers discovered a new horizontal black hole in Pisces with the help of Chandra X-ray telescope. By studying the duration and period of X-ray bursts, scientists have roughly determined the level of black holes-the mass is equivalent to 1 10,000 suns.

Scientists say that the newly discovered black hole can only be regarded as a medium-sized black hole. There are two main types of black holes detected by scientists before, one is a star-like black hole with a mass only ten times that of the sun, and the other is a super black hole with a mass several billion times that of the sun.

The black hole discovered this time is located in the M74 galaxy in Pisces, about 32 million light years away from the Earth. Scientists explained that the X-ray burst period of the black hole is about 2 hours, and its intensity is about equivalent to 10- 1000 neutron stars or star-like black holes.

Scientists believe that the periodic changes of X-ray radiation of black holes are related to the changes of hot gas disks gathered around them. Previously, scientists also learned through long-term research that the period of black hole radiation is also closely related to its quality. According to the above two factors, scientists can judge that the mass of a black hole is approximately equivalent to 10000 suns.

Scientists also said that there are generally two ways to produce such black holes: first, this medium-mass black hole is formed by the merger of dozens or even hundreds of star-level black holes in the center of high-density clusters;

It is the residue of small galactic nuclei formed by large galaxies gradually devouring small galaxies.