Stars and Galaxies in the Universe

11.1  Stars and Galaxies in the Universe                      


Types of galaxies
\(\swarrow\) \(\downarrow\) \(\searrow\)
Spiral Elliptical Irregular

 * Andromeda

 * The Milky Way

 * Ursa Major

 * Messier 87

 * Small Magellanic Cloud

 * Large Magellanic Cloud

The Milky Way

  • The Milky Way is a medium large spiral galaxy
  • Our solar system is located at the edge of one of the spiral arms of the Milky Way
  • It consists of approximately 200 billion stars and the Sun is one of it



Characteristics to Classify Stars

  • Colour 
  • Size
  • Distance
  • Brightness
  • Temperature