curprev09:1209:12, 6 July 2023 167.179.188.26talk 33,379 bytes−5 →References: The original link (http://asa.usno.navy.mil/SecM/Glossary.html#_O) did not resolve on my web browser. The new link I provided (https://aa.usno.navy.mil/faq/asa_glossary) was sourced from the National Library of Australia's website (https://catalogue.nla.gov.au/Record/3836458) via the 'Online Access' link (http://purl.access.gpo.gov/GPO/LPS49630).undoTag: Visual edit