We are having another Sigma Fun Day, this time at Craigellachie on Saturday 26th September.
Details are here,
That means I'll be making more comets but we will have far more dry ice than I will need. Rather than have it just sublime away, I've arranged to go to the Steiner School in Forres to do the solar system using IZAL toilet paper and Playdough, fire some rockets and make a comet for a couple of classes.
So it's going to be Friday morning, Saturday afternoon and Saturday evening. Hope I have more energy than I have now. The last two nights have been incredibly clear with no Moon but I just can't drag myself out to hunt down any deep sky objects.