Basic concept of universe .
UNIVERSE : Existing matter and energy are together know as universe.The study of universe is know as cosmology.Cosmology ( Origin Cosmos( = Universe) + Logos (=science ).Universe includes all the universal bodies and the complete solar family which comprises sun, moon, planets, comets, planetoids etcsun,moon,planet etc.The universe or the cosmos, as perceived today, consists of millions of galaxies.A galagy is a huge congregation of stars held together by the force of gravity.In the ancient times , the knowledge about the universe was vague and confined to mystery and religious perceptions.In 140 AD,ptolemy propounded the theory that the earth was the centre of the universe and the sun and other heavenly bodies revolved around it. In 1543,copernicus argued that the sun and not the earth was the centre of universe.However, he still equated the universe with the solar system. kepler supported copernicus but said that the sun was the centre of the solar system and not the universe.Later, pulsating universe theory was given which says that universe periodically expands from the explosion of the primordial body, then contracts back and explodes again, over immensely long cycles,ad infinitum.
UNIVERSE : Existing matter and energy are together know as universe.The study of universe is know as cosmology.Cosmology ( Origin Cosmos( = Universe) + Logos (=science ).Universe includes all the universal bodies and the complete solar family which comprises sun, moon, planets, comets, planetoids etcsun,moon,planet etc.The universe or the cosmos, as perceived today, consists of millions of galaxies.A galagy is a huge congregation of stars held together by the force of gravity.In the ancient times , the knowledge about the universe was vague and confined to mystery and religious perceptions.In 140 AD,ptolemy propounded the theory that the earth was the centre of the universe and the sun and other heavenly bodies revolved around it. In 1543,copernicus argued that the sun and not the earth was the centre of universe.However, he still equated the universe with the solar system. kepler supported copernicus but said that the sun was the centre of the solar system and not the universe.Later, pulsating universe theory was given which says that universe periodically expands from the explosion of the primordial body, then contracts back and explodes again, over immensely long cycles,ad infinitum.
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