Observing

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

  13 December 2019

  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.

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  Bright Moon photobombs Geminid meteor shower peak on 14 December

  5 December 2019

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  See Mercury at its best meet Mars in the dawn sky

  18 November 2019