Dara O Briain and Professor Brian Cox return to celebrate the wonder of our amazing night sky.Live from Jodrell Bank observatory, the team kick off with a look at the mysteries of the moon and meet Captain Eugene Cernan, the last man ever to walk on its surface.Liz Bonnin reports direct from South Africa on the differences between the constellations of the northern and southern hemispheres whilst Mark Thompson offers help on buying all the kit you need to get started in astronomy.