At around 9pm on Saturday, I was beginning to think the clouds might have brought our evening to an end. Two astronomy explainers from the Royal Observatory had just arrived, and I was concerned that they would leave without seeing anything. I just about managed to show them Almach through a gap, with its golden-yellow and blue components. Then, almost out of nowhere, the sky cleared overhead and we got a wonderful view of Saturn, now higher in the south-east. Their reaction