second

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Related to Arc seconds: Milliarcsecond

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 ?
0] ranges from 3 centimeters in very poor seeing (when it is hard to distinguish double stars 2 arc seconds apart) to perhaps 20 or 30 cm when the seeing is quite good.
Two arc seconds is an incredibly small angle -- equal to the separation of a car's headlights seen 100 kilometers away -- giving some idea of what we are up against when dealing with the atmosphere.
05 arc second, so a given exposure reveals stars two to three times fainter than before; contrast and dynamic range are also vastly increased.
During one 20-minute visual test, the total periodic error was 47 arc seconds with the maximum rate of drift being less than 12 arc seconds per minute -- an amount that could be corrected by pressing the guide button for two seconds
15 arc second and reveal a slightly elongated object no farther than that from the position of Sgr A*.
Early studies of the central radio source's optical counterpart, a 16th-magnitude giant elliptical galaxy, revealed two bright knots about 2 arc seconds apart in the center of the system.
Bruce Partridge (Haverford College) and Edward Fomalont (National Radio Astronomy Observatory) are using the Very Large Array radio telescope in New Mexico to search for variations on angular scales from 10 arc seconds to about 1 arc minute.
You also need to input your pixel size in arc seconds.
while the A-axis is [+ or -] 6 arc seconds and the C-axis is [+ or -] 4 arc seconds.
Disc positional accuracies of a few arc seconds and scale accuracies of up to one micron in 12mm are possible in scales with lengths of up to two meters.
02 arc seconds across - the equivalent of a dime viewed from more than 100 miles away.