A delight and a triumph ... A thing of beauty ... Truly, truly magical' Mark Dolan, talkRADIOExpert science writer Giles Sparrow guides you through 21 stars you can see in the night sky and what they can teach us about our universe.

On a clear evening, if you look up you can see thousands of stars shining in the dark sky, each with a story of their own. Taking 21 stars (and three imposters, that cheekily aren't technically stars), expert science writer Giles Sparrow offers a complete introduction to what is happening up in the night sky. Sparrow draws 'star...