The northern lights or Aurora Borealis have been the source of fascination for mankind for thousands of years. Whether you’ve seen them on TV or in real life, these incredible moving curtains of light in the night sky seem even better than the best modern CGI! The lights begin as high as 96km where blue is typically seen, while the green curtains of lights occur higher at 240km and red-colored curtains are seen even higher. Typically oxygen produces yellow and green shades while nitrogen gives off red-violet and blue. The northern lights are generally associated with green, pink, yellow, violet, blue, orange and white colors.