I Wonder Why: Stars Twinkle

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Why do stars twinkle? What are stars made of? How do astronauts go to the loo? What is a red giant? How hot is the sun? Will the universe ever end?

If you’ve ever looked at the sky above your head and wondered what’s up there, crack open this weird and wonderful fact book to see! It’s full of gobsmacking facts to astonish and amaze you… and to make you say ‘erk’!