Main Point of Universe and Solar System for your great knowledge

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                             Our Universe


Universe 

  • All the heavenly bodies like stars, planets, satellites, asteriods, meteors, comets are called Celestial Bodies.
  • Science of studying heavenly bodies is known as Astronomy. The study of universe is known as Cosmology.
  • The origin of the universe has been explained by Big-Bang Theory.
  • Big-Bang Theory was an explosion that occurred 13.8 billion years ago, leading to the formation of stars and other heavenly bodies.

 Galaxy 

  • A Galaxy is a vast system of billions of stars, which also contains a large number of gas clouds and dust, isolated in space from similar system.
  • Galaxies are mainly found in three shapes-i.e. spiral, elliptical, and irregular.
  • Our solar system is a part of Milky Way Galaxy which is spiral in shape. In India, it is known as Akash Ganga.
  • The Milky Way Galaxy was First observed by Galileo.

 Constellations and Stars

  • The Indian name for Constellation is Nakshatras. They are a group of stars that froms a particular shape in the sky. e.g Orion belt.
  • The International Astronomial Union has recognised 88 Constellations in the Sky.
  • A Star is a shining body in the Sky which has light of its own as it is made up of hot and burning gases.
  • The brightest star of our solar system is Sirius (Dog star) and the closest star is Proxima Centuari.


 Solar System

  • The solar systme is the gravitationally bound system comprising the Sun and the Objects that orbit it.
  • The objects which orbit Sun are eitht major planets, five dwarf planet, satellites, asteroids, meteors and comets etc.
  • The Sun is about 150 million km away from the Earth and its light takes about 8.3 munutes to reach the Earth.
  • The planet have been divided into inner and outer planets.
          Inner planets are Mercury, Venus, Earth, Mars.
          Outer planets are Jupiter, Saturn, Uranus and Neptune.
  • The Sun is also the source of all the energy in the solar system. Hydrogen and Helium are the main gases present in the Sun.

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