Andromeda Galaxy Andromeda Galaxy The Andromeda Galaxy (), also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth, and the nearest major galaxy to the Milky Way. Its name stems from the area of the sky in which it appears, the constellation of Andromeda. The 2006 observations by the Spitzer Space Telescope revealed that the Andromeda Galaxy contains approximately one trillion stars, more than twice the number of the Milky Way's estimated 200 to 400 billion stars. The Andromeda Galaxy's mass is estimated to be around 1.76 times that of the
The Internet Galaxy The Internet Galaxy The Internet Galaxy: Reflections on the Internet, Business, and Society is a book by Manuel Castells, Professor of Sociology and Professor of City and Regional Planning at the University of California. It was published by Oxford University Press in 2001. The title is a reference to "The Gutenberg Galaxy", a 1962 book by Marshall McLuhan. It is regarded as a good introduction to Social informatics. The book contains 9 chapters. Castells starts with the history of Internet, focuses on the process of Internet evolution influence our society. He emphasizes the development of Internet from 1962 to 1995,