My mother is an astronomist (not to be confounded with astrologist!) - and this hat is designed for her. Cassiopeia in the front, the Big Dipper (or the Plough in Britain) in the back, and the North Star on the top.
Yarn: For the main colour, I used to strands og Rauma Lamullgarn held together, and for the contrasting colour I used to strands of Kauni effektgarn.
Sizes: The pattern gives instruction for three sizes, small, medium and large, by differences in gauge (23, 24 or 26 sts per 10 cm)