Examples of arc second in a Sentence
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The Gaia satellite, however, is off by no more than 24 millionths of an arc second, the width of a human hair from 1,000 kilometers away.
—
Ann Finkbeiner, Scientific American, 1 Feb. 2024
Their sky brightness must routinely be 21.5 magnitudes per square arc second or darker—in comparison, a theoretically perfect dark site would have a brightness of 22, while a city with a very polluted light sky could measure around 16 or 17.
—Margaret Osborne, Smithsonian Magazine, 24 Feb. 2023
The night sky brightness must typically be equal to or darker than 21.2 magnitudes per square arc second.
—Stacey Leasca, Travel + Leisure, 6 May 2021
Hubble has a diameter of 2.4 meters, which gives a resolution of 0.13 arc second for observations at a one-micron wavelength.
—Meredith A. MacGregor, Scientific American, 19 May 2020
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Ann Finkbeiner, Scientific American, 1 Feb. 2024
Their sky brightness must routinely be 21.5 magnitudes per square arc second or darker—in comparison, a theoretically perfect dark site would have a brightness of 22, while a city with a very polluted light sky could measure around 16 or 17.
—Margaret Osborne, Smithsonian Magazine, 24 Feb. 2023
The night sky brightness must typically be equal to or darker than 21.2 magnitudes per square arc second.
—Stacey Leasca, Travel + Leisure, 6 May 2021
Hubble has a diameter of 2.4 meters, which gives a resolution of 0.13 arc second for observations at a one-micron wavelength.
—Meredith A. MacGregor, Scientific American, 19 May 2020
Cite this Entry
“Arc second.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arc%20second. Accessed 30 Apr. 2025.
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