Beyond the Sky: Getting Closer to Extragalactic Systems

Author: Zhang Mingchang
Publisher:
Publish Date: 2000-05-28
Features: This book is the "Exploring Extragalactic Systems" volume of "Fun Literature" titled "Beyond the Sky." The vast Milky Way is not prominent in the universe; there are numerous galaxies that are larger, brighter, and contain more stars. Of course, due to the extremely distant distances of extragalactic systems, the human eye cannot clearly discern their "true appearance." It wasn't until the 1920s that the immense power of the "Hubble Telescope" allowed human vision to gradually penetrate the depths of the universe, confirming the existence of galaxies and scientifically classifying them. Galaxies exhibit a stronger tendency to form clusters than stars. However, from a broader perspective, galaxies are also separating from one another. This separation movement of galaxies depicts the expansion of the universe, marking another major leap in humanity's understanding of the cosmos.