Starwatch: full moon to pass through three constellations

First up will be Gemini, the twins, then Cancer, the crab, and finally Leo, the lion

This week, the full moon will cruise through three zodiacal constellations. First Gemini, the twins; then Cancer, the crab; and finally Leo, the lion.

The chart shows the view at 2100 GMT on 17 January, looking east-south-east from London. The moon will be full and sitting just below the two brightest stars of Gemini: Castor and Pollux. The brighter of the two, and the star nearest to the moon, is the yellow-tinged Pollux, while the one above is the whiter but dimmer Castor.