NORTHERN LIGHTS

NORTHERN LIGHTS (AURORA BOREALIS )

        Welcome viewers, 

                    This is the blog about Northern lights which is one of the most beautiful events in this mysterious world. Let us see the few information about the dreamy place.

Introduction:

        The Northern lights has been derived from Aurora which is the name of the Roman goddess and Borealis which is a Greek word for wind.Mostly seen in the northern horizon and polar zone.

Best places to see the Northern lights:

        The best places to see the Northern lights Alaska-USA, Northern Canada, Iceland, Norway, Finland, Russia, Sweden and Greenland are the right choice.

 

        

Classification:

        Diffuse aurora: Featureless glow in the sky which may not be visible to the naked eye. 

          Discrete aurora: Sharply defined features within the diffuse aurora within vary in brightness from just barely visible to the naked eye. 

Causes for the Northern lights:

            Earth's atmosphere is mostly made up of nitrogen and oxygen. 
            
            Once the solar particles reach Earth's atmosphere,they collide with atoms of nitrogen and oxygen, stripping away their electrons to leave ions in excited states.
            
            These ions emit radiation at various wavelengths, creating the characteristic colours.
    
            When the Sun is more active and larger amounts of plasma are erupting from the Sun's surface,more particles reach Earth's atmosphere, and the auroras occasionally extend to the middle latitudes.

Causes for that colours:

                Collisions of solar particles with oxygen produce red or green light and collisions with nitrogen produce green and purple light.