The Measurement of Small Time Intervals By the Ancient Astronomers

Autor:	D. Papathanassoglou, E. Theodossiou, V. N. Manimanis
Rok vydání:	2006
Předmět:	symbols.namesake Planck epoch media_common.quotation_subject Ptolemy's table of chords symbols Astronomy Art Astrophysics Sundial media_common
Zdroj:	AIP Conference Proceedings.
ISSN:	0094-243X
DOI:	10.1063/1.2348080
Popis:	The use of divisions of the day by the Chaldaeans marked the beginning of time measurements using sundials, astronomical instruments and water clocks. Ptolemy introduced the “first small parts” and “second small parts”, i.e. the minutes and seconds we use today; however, we argue that back then they represented purely theoretical units since no time measurement had an accuracy higher than 1 minute.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9ca1d8c13fab042f802ea1f72298e21e https://doi.org/10.1063/1.2348080 Zobrazit plný text záznamu