second of arc
Americannoun
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
This was a significant technical challenge, since, even for the nearest stars, parallax angles are usually only a fraction of a second of arc.
From Textbooks • Oct. 13, 2016
The Mount Wilson Observatory announced that it had completed measurement of the variable star Mira and found it to be, by angular measurement, .06 of a second of arc � about 25% larger than Betelgeuse.
From Time Magazine Archive
University of Toronto astronomers, give results for the bending of a stellar ray just grazing the sun's edge, within one-hundredth of a second of arc of Einstein's prediction that they would be deflected 1.75 seconds.
From Time Magazine Archive
Their parallax is accordingly half a second of arc.
From Pioneers of Science by Lodge, Oliver, Sir
For instance, the “canals” appear to have a breadth of from 15 to 20 miles, corresponding to 1⁄16th, and 1⁄12th, of a second of arc, at an average opposition.
From Are the Planets Inhabited? by Maunder, E. Walter (Edward Walter)
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
