With the cloud base 50 metres below the house, I guess I won’t be opening up the Observatory tonight then! Rummaging through the files on the laptop, I came across some avi’s taken last year for a Moon mosaic I was working on. With nothing better to do, I reloaded this section into Registax six to try and eak out a little more detail. What struck me was the radial ejecta from Aristillus which…