When did The Sky at Night Season 21 Episode 3 air?
The Sky at Night Season 21 Episode 3 aired on March 16, 1977.


Your monthly journey through the fascinating world of space and astronomy with the latest thinking on what's out there in space and what you can see in the night sky.
First detailed photographs of Mercury, the innermost planet, were obtained by the American space-probe Mariner 10. Maps of Mercury have been drawn from these photographs by Arthur Cross and in this programme he joins Patrick Moore to explain how the maps were made and what they have told us.
Direct answers for episode-level questions and details.
The Sky at Night Season 21 Episode 3 aired on March 16, 1977.
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