Origin of Earth <br />Earth is presumed to be originated 4.5 billion years ago either as a part broken of the sun or by gradual condensation of nebulous residue of gas and the dust surrounding the sun. Different theories were proposed by different scientists as given below <br />Big-bang Hypothesis - given by Abbe Lemaitre. According to him <br /> <br />A vast, dense, red hot and rotating gaseous cloud of cosmic dust, collide together and gave rise to atoms of hydrogen. <br />The atoms of hydrogen fused into heavier atoms of different elements. <br />The original gaseous cloud spread out into space and divided into larger and smaller masses, forming stellar systems and stars. <br />View complete article on neetaiims.com
