Cosmology
Main article: Cosmology Cosmology is study of the Universe in its totality, and by extension, humanity's place in it. Though the word cosmology is recent (first used in 1730 in Christian Wolff's Cosmologia Generalis), study of the Universe has a long history involving science, philosophy, esotericism, and religionIn 1917, Einstein applied the General theory of relativity to model the structure of the universe as a whole. He wanted the universe to be eternal and unchanging, but this type of universe is not consistent with relativity. To fix this, Einstein modified the general theory by introducing a new notion, the cosmological constant. With a positive cosmological constant, the universe could be an eternal static sphere[56]
Einstein believed a spherical static universe is philosophically preferred, because it would obey Mach's principle. He had shown that General relativity incorporates Mach's principle to a certain extent in frame dragging Albert Einstein's theory of general relativity predicts that rotating bodies drag spacetime around themselves in a phenomenon referred to as frame-dragging. The rotational frame-dragging effect was first derived from the theory of general relativity in 1918 by the Austrian physicists Josef Lense and Hans Thirring, and is also known as the Lense- by gravitomagnetic fields Gravitomagnetism , refers to a set of formal analogies between Maxwell's field equations and an approximation, valid under certain conditions, to the Einstein field equations for general relativity. The most common version of GEM is valid only far from isolated sources, and for slowly moving test particles, but he knew that Mach's idea would not work if space goes on forever. In a closed universe, he believed that Mach's principle would hold.
Mach's principle has generated much controversy over the years.
After her husband's many relocations, Mileva established a permanent home with the children in Zürich in 1914. Einstein went alone to Berlin Berlin is the capital city and one of sixteen states of Germany. With a population of 3.4 million within its city limits, Berlin is Germany's largest city. It is the second most populous city and the eighth most populous urban area in the European Union. Located in northeastern Germany, it is the center of the Berlin-Brandenburg metropolitan area,, where he became a member of the Prussian Academy of Sciences The Prussian Academy of Sciences was an academy established in Berlin on 11 July 1700 and a professor at the Humboldt University of Berlin The Humboldt University of Berlin is Berlin's oldest university, founded in 1810 as the University of Berlin (Universität zu Berlin) by the liberal Prussian educational reformer and linguist Wilhelm von Humboldt, whose university model has strongly influenced other European and Western universities. From 1828 it was known as the Frederick William, although with a special clause in his contract that freed him from most teaching obligations. He also directed of the Kaiser Wilhelm Institute for Physics The Kaiser Wilhelm Gesellschaft is a German entity formally known as the Kaiser-Wilhelm-Gesellschaft zur Förderung der Wissenschaften e. V. . The Kaiser Wilhelm Society was the umbrella organization for the institutes, testing stations, and units spawned under its authority (1914-1932).[57]<<Table of Contents Albert Einstein was an ethnically Jewish, German-born theoretical physicist. He is best known for his theories of special relativity and general relativity. Einstein received the 1921 Nobel Prize in Physics "for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect.". He is often | Next>> | Show All>>
