Rare sighting of a blue moon due soon

By Laura McIntyre
Updated July 31 2015 - 7:41am, first published July 30 2015 - 5:30pm
Local astronomer Peter Neilson. Photo: BELINDA SOOLE
Local astronomer Peter Neilson. Photo: BELINDA SOOLE

THE expression "once in a blue moon" has a long history of being used to describe rare events.

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