Paperback. The Equation-of-Time denotes the variance between Mean Time as told by the Stars and Solar Time as told by the Sun. It was initially identified by Ptolemy around 200 CE. During the Early Middle Ages, astronomers utilized this Equation to assist in lunar observations. Throughout the High & Late Middle Ages, sundials held prominence as the primary means of timekeeping, indicating Solar Time. However, in the 17th century CE, the emergence of precise pendulum clocks and watches prompted a gradual shift towards the adoption of Mean Time over Solar Time. In particular, the use of Solar Time corrected by the Equation-of-Time to determine local mean time, was used in the determination of longitude at sea. Prior to the availability of time signals, sundials - together with tables detailing the Equation - were used to set clocks. Shipping may be from our Sydney, NSW warehouse or from our UK or US warehouse, depending on stock availability.

Codice articolo 9781445745411

Contatta il venditore

Segnala questo articolo

Dati bibliografici

Titolo: The Equation of Time - AEquatio Dierum (Paperback)
Editore: Lulu.com, London
Data di pubblicazione: 2024
Lingua: Inglese
ISBN 10: 1445745410
ISBN 13: 9781445745411
Rilegatura: Paperback
Condizione: new

Descrizione articolo

Riassunto

The Equation-of-Time denotes the variance between Mean Time as told by the Stars and Solar Time as told by the Sun. It was initially identified by Ptolemy around 200 CE. During the Early Middle Ages, astronomers utilized this Equation to assist in lunar observations. Throughout the High & Late Middle Ages, sundials held prominence as the primary means of timekeeping, indicating Solar Time. However, in the 17th century CE, the emergence of precise pendulum clocks and watches prompted a gradual shift towards the adoption of Mean Time over Solar Time. In particular, the use of Solar Time corrected by the Equation-of-Time to determine local mean time, was used in the determination of longitude at sea. Prior to the availability of time signals, sundials - together with tables detailing the Equation - were used to set clocks.

Informazioni sull?autore

The author has lectured internationally on the Equation of Time, the history of time keeping and sundials www.equation-of-time.info

Le informazioni nella sezione "Su questo libro" possono far riferimento a edizioni diverse di questo titolo.

Descrizione libreria

Visita la pagina della libreria

Informazioni sull?azienda del venditore

The Nile Group Pty Ltd
42 Apex Drive, Truganina, VIC, 3029, Australia

Condizioni di vendita e spedizione

Condizioni di vendita

We guarantee the condition of every book as it's described on the Abebooks web sites. If you're dissatisfied with your purchase (Incorrect Book/Not as Described/Damaged) or if the order hasn't arrived, you're eligible for a refund within 30 days of the estimated delivery date. If you've changed your mind about a book that you've ordered, please use the Ask bookseller a question link to contact us and we'll respond within 2 business days.

Condizioni di spedizione

Please note that titles are dispatched from our UK and NZ warehouse. Delivery times specified in shipping terms. Orders ship within 2 business days. Delivery to your door then takes 8-15 days.