Some curious things have been happening in the skies over the past week. I’m not just talking about the fact that they’ve turned a quite wonderful shade of blue and that the great yellow ball has emerged unhidden by cloud for more than one day at a time, although that can be classified as somewhat of an unusual sight. No, instead the occurrence was in the night sky – the appearance of what is called a ‘perigee-syzygy’ or, for the cosmologically challenged amongst us, a ‘supermoon’. It doesn’t mean that the satellite of the sky has been genetically modified or taken on any secret identities; rather that the full moon just passed was orbiting the closest to Earth than it has at any time over the past eighteen years, giving the illusion of it being bigger than ever before.