Why darkness between stars reveals more about the universe than light

A dense collection of stars covers the view. Towards the centre the stars become even more dense in a circular region, and also more blue. Around the edges there are some redder foreground stars, and many small stars in the background.

When looking up at the night sky, light from stars draws attention. But the darkness between the light can reveal even more about the universe, says Nobel prize-winning astrophysicist Adam Riess

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