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arcsec

British  
/ ˈɑːksɛk /

noun

  1. 1/ 3600 of a degree of an angle

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Photon events from the afterglow were selected using a circular extraction region of radius 1 arcsec, while the background level of 2.3 × 10−6 counts arcsec−2 s−1 was estimated from nearby source-free regions.

From Nature Oct. 15, 2017

Einstein calculated from general relativity theory that starlight just grazing the Sun’s surface should be deflected by an angle of 1.75 arcsec.

From Textbooks Oct. 13, 2016

The best parallaxes obtained with Hipparcos have an accuracy of 0.001 arcsec.

From Textbooks Oct. 13, 2016

In the nineteenth century, however, it was observed that the actual advance is 574 arcsec per century.

From Textbooks Oct. 13, 2016

The prediction of general relativity is that the direction of perihelion should change by an additional 43 arcsec per century.

From Textbooks Oct. 13, 2016

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