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THE NIGHT SKY

Network Three
on Network Three

in May by J. G. Porter , Ph.D., F.R.A.S.
This month Dr. Porter talks about some of the interesting objects in Cepheus and Cassiopeia-among them the Cepheid variable stars, which astronomers use as 'standard candles' for measuring the distances between galaxies.

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J. G. Porter
Source: Radio Times

Network Three

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