Stop-Motion Animation to Model the Analemma

Autor:	Amanda Hunter, Leslie Atkins Elliott, Carl Krutz, ShaKayla Moran, Elliot Sherrow
Rok vydání:	2021
Předmět:	media_common.quotation_subject General Physics and Astronomy Noon Analemma Geodesy Education Gnomon Geography Sky Local time Solstice Variation (astronomy) Sundial media_common
Zdroj:	The Physics Teacher. 59:230-231
ISSN:	1943-4928 0031-921X
DOI:	10.1119/10.0004142
Popis:	The Sun does not return to the same position in the sky every 24 hours. At local noon, for example, the Sun will appear higher in the sky as we move from winter to summer solstice. In addition, and perhaps more surprisingly, solar days (the roughly 24 hours between subsequent local noons) vary in length, causing the Sun to be east or west of its location 24 hours prior. Over a year, this variation traces out a figure 8, known as an analemma, as shown in Fig.1. It can also be seen in the sundial in Fig. 2, where the gnomon incorporates the analemma to produce an accurate reading of local time.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ec5a1c3d2ed6ff4b6bd4efc480611a47 https://doi.org/10.1119/10.0004142 Zobrazit plný text záznamu