ocr: TOWARDS MODERN WORLD VIEW The expansion of the universe was contirmed in 1929 when Edwin Hubble observed that distant objects are receding from US. This proved the model proposed by Alexander Friedmann already in 1922, according to which the universe either expands or contracts but is not of - - a constant size. Inl Hubble's fime it had long been the object of heated debate whether the Milky Way plus a few distant stars composed the enfire universe. Hubble's observations proved that the Milky Way was just one among many galaxies just like Andromeda, pictured here. Later in 1940 the German-born ...
