Pedro Nunes and the Retrogression of the Sun
|Title:||Pedro Nunes and the Retrogression of the Sun||Authors:||Lynch, Peter||Permanent link:||http://hdl.handle.net/10197/11255||Date:||2018||Online since:||2020-01-17T16:07:03Z||Abstract:||In northern latitudes we are used to the Sun rising in the East, following a smooth and even course through the southern sky and setting in the West. The idea that the compass bearing of the Sun might reverse seems fanciful. But that was precisely what Portuguese mathematician Pedro Nunes showed in 1537. Nunes made an amazing prediction: in certain circumstances, the shadow cast by the gnomon of a sun dial moves backwards.||Type of material:||Journal Article||Publisher:||Irish Mathematical Society||Journal:||Bulletin of the Irish Mathematical Society||Volume:||81||Start page:||23||End page:||30||Copyright (published version):||2018 Irish Mathematical Society||Keywords:||Astronomical phenomena; Solar retrogression||Subject LCSH:||Nuñes, Pedro, 1502-1578||Other versions:||https://www.maths.tcd.ie/pub/ims/bull81/index.php||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Mathematics and Statistics Research Collection|
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