second

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Related to Second of arc: Arcseconds

second

(Backer), noun advocate, aide, angel, backer, champion, endorser, patron, promoter, supporter

second

(Moment), noun before you know it, brief peeiod of time, flash, flash of an eyelid, instant

second

verb approve, assist, authorize, back, back up, confirm, endorse, favor, pass, ratify, receipt, recommend, sanction, stand behind, subscribe, support, validate, vote for, warrant
Associated concepts: second lien
See also: abet, abettor, advocate, agree, aid, approve, assist, assistant, backer, bear, concur, confirm, countersign, deputy, endorse, help, indorse, justify, organize, point, proctor, promote, recommend, replacement, side, support, uphold

SECOND. A measure equal to one sixtieth part of a minute. Vide Measure.

References in periodicals archive ?
As an extension of the VLT, the West German report proposes a 1-kilometerlong array of six to 12 telescopes that would be capable of resolving detail in visible light to one ten-thousandth of a second of arc, which is as well as radio VLBI now does.
1 second of arc, and after a great deal of work, its images can be coaligned and made to coincide as well as astronomers would like.
This Mark III interferometer, as they call it, will be used at first for astrometry, measuring star positions to an accuracy of a thousandth of a second of arc.