Equatorial ring
id:
equatorial-ring-234-10982056
title:
Equatorial ring
text:
An equatorial ring was an astronomical instrument used in the Hellenistic world to determine the exact moment of the spring and autumn equinoxes. Equatorial rings were placed before the temples in Alexandria, in Rhodes, and perhaps in other places, for calendar purposes. The easiest way to understand the use of an equatorial ring is to imagine a ring placed vertically in the east-west plane at the Earth's equator. At the time of the equinoxes, the Sun will rise precisely in the east, move across
brand slug:
wiki
category slug:
encyclopedia
description:
Instrument to determine the moment of the equinoxes
original url:
https://en.wikipedia.org/wiki/Equatorial_ring
date created:
date modified:
2023-03-10T15:18:20Z
main entity:
{"identifier":"Q5384292","url":"https://www.wikidata.org/entity/Q5384292"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/9/92/Equatorial_ring.png","width":492,"height":536}
fields total:
13
integrity:
15