SET 2

                             
  NORTHERN LIGHTS

       Northern Lights are natural lights display in the sky particularly in the high latitude regions.What is more,Northern Lights are known as Aurora.They are caused by the collision of energetic charged particles with atoms in the high altitude atmosphere.

    Northern Lights are generally observed at nights and happen ionosphere layer.In general,Auroras are seen between 60 and 72 degrees north and south latitudes.

       

      Auroras can be observed all over the world and on other planets. Further more; it was dark and the magnetic field ,become more visible closer  to the poles.

Green is the most prevalent  in all of the  auroras, and then pink, (a mixture of green and red), followed by pure red, yellow (a mixture of red and green), and finally the pure blue.