What are the concepts of quasars and constellations?

Quasars are a kind of celestial bodies similar to stars but with extremely special spectra. It is the farthest celestial body observed in the universe so far. It is generally considered to be the primitive stage of galaxies, with great brightness and little or no star formation. Studying it can help us understand the formation of galaxies and the early state of the universe.

constellation

Astronomers divide the starry sky into several regions for the convenience of research, and each region is called a constellation. At this point, the whole starry sky is divided into 88 constellations, of which 29 are north of the celestial equator, 46 are south of the celestial equator, and 13 passes through the celestial equator.