BBC Sky at Night

VENUS in a new light

On the evening of 9 January 1643, the Italian astronomer Giovanni Riccioli turned his telescope on to the planet Venus and, in doing so, ignited a mystery that has persisted until the present day. Riccioli was able to observe a dull glow coming from the night side of Venus – a phenomenon called ‘the Ashen Light’.

The Ashen Light is only

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