Celestial Phenomenas are fascinating me since long. If you are not observing the nature consciously you'll miss many spectacular phenomenas of the eart atmosphere. In central europe mainly colourful rainbows and halos are often visible. Sister Suns are also viewed on a regular basis as reflections on cold or hot air are. On higher altitudes and with sinking tempertures all the phenomena around ice cristals in the air reflecting and refracting sun rays are visible. These effects are also visible up north.