Professor Kurtz of UCLan (and Vice-President of the Royal Astronomical Society) will deliver an informative and entertaining lecture. The sky has many beautiful phenomena caused by the interaction of light with the air: blue skies, red sunsets, rainbows, glories, haloes, green flashes, sun dogs and blue moons. We will see pictures of these and learn where to see them and how they are formed. We will also see and learn about a blue sky on Saturn, murky sunsets on Mars, the black skies of many moons, and speculations about the skies on some of the more than 5000 exoplanets that have been discovered in recent years.