A compact galaxy is a distant galaxy that, in the starry sky, is like ordinary stars . This object has a high surface brightness , which has a large redshift , which indicates a significant distance to it. The largest galaxies, due to their brightness, can exceed the brightness of supergiant galaxies hundreds of times, having a blue color. Most of them have detected radio emission of non-thermal origin. According to the theory of astronomer I. Shklovsky , such radiation subsequently arises in the magnetic field of electrons and heavier charged particles. These particles must move at speeds close to the speed of light. Such speeds develop as a result of significant explosions in the galaxy.
A group of scientists from France , the USA and Chile published the results of research in January 2001 in The Astrophysical Journal, based on which spiral galaxies, and in particular ours, were formed from compact galaxies. The basis of this hypothesis is the fact that the spectra of distant bright compact galaxies are very similar to the spectra of the nuclei of spiral galaxies . According to scientists, modern compact galaxies can also evolve into spiral ones someday. The existence of galaxies of this type even before their discovery was foreseen by the Swiss astrophysicist F. Zwicky . The nearest compact galaxy is M 32 . Compact galaxies are distributed according to the type of radiation spectrum: from blue to infrared.