11 January 2016: Pink Northern Lights! Pink and purple lights are caused by nitrogen, and since nitrogen doesn't get excited as easily as oxygen, we tend to only see this when the Aurora activity is stronger! #travel #tromsø #norway #auroraborealis #northernlights #northernlightslive #chasinglights by chasinglights
 
 
          
      
 
  
 
 
 
 
 
 
 
 
 
 
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