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Planck at the final frontier of the universe

A picture of the first light emitted after the Big Bang

The European Planck satellite has transmitted a remarkable picture of the first light emitted after the Big Bang, drawing up a meticulous map of the sky.

On 13 August, Planck completed one uninterrupted year of scanning the vault of the heavens. On 24 March the satellite finished its first full circuit of the sky and delivered an extraordinary picture – of the very edge of the visual universe, the first light emitted after the Big Bang, a border beyond which it will never be possible to go …

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