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UPSC Geography 03 - Universe Galaxy & Sun

This Post and the attached video will explain the following points of Micro-Notes on UPSC Geography 03 - Universe Galaxy & Sun. Copy & Note it down carefully, as it will be very useful in Fast Revision of the entire topic of "UPSC Geography 03 - Universe Galaxy & Sun".

UPSC Geography 03 - Universe Galaxy & Sun


 Universe Galaxy & Sun

  • Earth
  • Sun
  • Billions of Sun- Galaxy (Milky way)
  • Billions of Galaxy- Universe
  • Billions of Universe- Multiverse
Big Bang Theory


  • 13.8 Billion year ago
  • Universe is expanding
  • Entropy is Increasing
  • Background Microwave Radiation-Limit of Observable Universe
Galaxy
  • Milky way
  • 1,20,000 * 10,000 LY dimension
  • Speed of light = 1L 86K Miles per sec
Constellations
  • 88 Total
  • Hydra (Largest Visible)
  • Ursa - Bear
  • Orion - Hunter
  • Centaurus - Largest
Stars
  • Birth from Nebula
  • Undergoes Fusion
  • When ran out of fuel, they contracts then expands & ultimately explodes called Supernova Explosion
  • Became White Dwarf or Black Dwarf <1.4 Solar mass (Chandrasekhar limit)
  • >1.4 Neutron Star or Black Hole
  • Neutron Star ultimately became Pulser
Hertzsprung Russell Diagram
  • The Hertzsprung-Russell Diagram is a graphical tool that astronomers use to classify stars according to their luminosity
Sun
  • 30 KLY from the disc (halo)
  • G2 Star-classified so, as it has temperature 5,200–6,000 K & color yellowish white
  • Population 1 star means contains Heavier elements & is younger
  • Core
  • Photosphere
  • Chromosphere
  • corona





** Above Video is created by KapsOne Studies and Placement Center, Nagpur for Guidance of UPSC Civil Service (IAS /IPS / IFS / IRS / SSC / Railways / NDA), MPSC Rajyaseva, UPPSC, MPPSC, BPSC, RPSC aspirants on UPSC Geography 03 - Universe Galaxy & Sun.





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