4 Geography · 4.1.1 Universe, solar system and the Earth

4.1.1.2 Stars and galaxies: life cycle of a star and the Milky Way

Stars are huge balls of hot gas that shine by nuclear fusion; their mass decides whether they end as white dwarfs, neutron stars or black holes, and billions of them together form galaxies such as our Milky Way.

  • APPSC Group 1
  • Advanced level
  • 8 min read
  • Full course

Key terms

  • star
  • nuclear fusion
  • nebula
  • red giant
  • white dwarf
  • supernova
  • neutron star
  • black hole
  • Chandrasekhar limit
  • constellation
  • Pole Star
  • Milky Way
  • Andromeda
  • galaxy types

What this note covers

  1. Core factsFoundation
  2. ExplainedStandard
  3. DeeperAdvanced
  4. Mains writingMains writing
  5. Common trapsFoundation
  6. Quick revisionFoundation

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