Observing

Hunting for colourful double and triple stars in the constellation of Cassiopeia

13 December 2019 Ade Ashford

The instantly recognisable five-star M-shaped pattern of stars representing the constellation Cassiopeia (pronounced kas-ee-uh-pee-uh) lies almost overhead in the early evening as seen from the British Isles over the festive period. Cassiopeia is rich in wonderful double and multiple stars, so here’s our guide to some of the best for typical backyard telescopes.

Observing

Bright Moon photobombs Geminid meteor shower peak on 14 December

5 December 2019 Ade Ashford

The December Geminid meteor shower is generally regarded as the richest and most reliable of the major annual shooting star displays. This year the predicted peak occurs between 2h and 23h UT (2am to 11pm GMT) on Saturday the 14th, but its bright and slow-moving shooting stars will have to contend with the glare of a nearby Moon just two days after full.