GEMS OE WORLD KNOWLEDGE
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What is the Universe?
Over the ages man has developed various concepts about the universe . Ancient astronomers and mathematicians believed the universe to be centred around a motionless earth . This concept was then changed by Copernicus who gave the theory of the universe being centred around the Sun . It was in the 19th century that the perception of the universe was further widened . British astronomer Herschel came out with the view that the Solar system was part of a much bigger star system , namely the Galaxy . This vision was again expanded in the 20th century by American astronomer Hubble , who contented , that the universe consisted of millions of galaxies . According to modern astronomy the universe consists of everything that is in the cosmos and that can affect us by means of physical forces . This therefore excludes anything that is physically undetectable .
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