Science Questions

Sun, 2nd Oct 2005

Part of the show Science of Lasers, Light, Kung Fu and Archimedes


Suzanna asked:

There's a rhyme that goes 'Red sky at night, shepherd's delight. Red sky at morning, shepherd's warning'. I don't understand it.


I think it's just a myth. Red sky at night, Hackney's burning! It's a well established old proverb, but I'm not sure whether it has any validity scientifically. When you have a very very rich sunset, it's because there's a high quantity of particulate matter (or dust) in the atmosphere. A lot of dust in the air is usually down to volcanoes, traffic, industry and the harvest. But I don't think that it has any linkage to making the weather better. I suppose you could argue that dust might lead to global warming, and that that will warm the planet up, but I don't think the rhyme is all that true to be honest.


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