How To Use Arcsec In A Sentence
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See, I'm just biased towards interferometers; -) ** One arcsecond is 1/60th of an arcminute, and one arcminute is 1/60th of a degree.
First Stellar Images
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Fading from mag -2.6 to -2.4 and shrinking in diameter from 43 to 39 arcsec during the month, it is conspicuous near the Moon on the 2nd and again on the 30th.
Starwatch: The January night sky
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CHAPTER 4 Hyperbolic Functions 65 arcsinh x ¼ ln ½x þ ðx2 þ 1Þ1 = 2 Š arccosh x ¼ ln ½x þ ðx2 À 1Þ1 = 2 Š arctanh x ¼ 0: 5 ln ½ð1 þ xÞ = ð1 À xÞŠ arccsch x ¼ ln ½xÀ1 þ ðxÀ2 þ 1Þ1 = 2 Š arcsech x ¼ ln ½xÀ1 þ ðxÀ2 À 1Þ1 = 2 Š arccoth x ¼ 0: 5 ln ½ðx þ 1Þ = ðx À 1ÞŠ In these expressions, the values 0.5 represent exactly 1 = 2.
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Mars, slow-moving below Leo's hindquarters, doubles in brightness from mag 0.2 to -0.6 as its distance plummets from 156 million to 119 million km and its diameter swells to 12 arcsec.
Starwatch: The January night sky
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To image something green on the sky to 1 arcsecond (which optical telescopes routinely do) thus requires a telescope of size at least 10 cm.
Two Trinities
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HYPERBOLIC ARCSECANT Figure 4-11 is a graph of the function y ¼ arcsech x (or y ¼ sechÀ1 x).
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In astronomy, the preferred unit of measurement for such distances is the parsec, which is defined as the distance at which an object will appear to move one arcsecond of parallax when the observer moves one astronomical unit perpendicular to the line of sight to the observer.
Ann Aguirre » Blog Archive » A day in the life – blog Jeopardy
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Catch it 6° below-left of the earthlit crescent Moon on the 26th when its gibbous disc is 15 arcsec across.
Starwatch: The January night sky
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During February, it brightens from mag -4.1 to -4.2 and its gibbous disc swells from 15 to 18 arcsec.
Starwatch: The February night sky
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Catch it 6° below-left of the earthlit crescent Moon on the 26th when its gibbous disc is 15 arcsec across.
Starwatch: The January night sky
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We propose to use FGS 1r to obtain parallaxes with an accuracy of 0.2 milliarcsecond for 9 main sequence stars with [Fe/H]
SpaceRef Top Stories
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We propose to use FGS 1R to obtain parallaxes with an accuracy of 0.2 milliarcsecond for 9 main sequence stars with [Fe/H]
SpaceRef Top Stories
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Through a telescope, its phase changes between 28% and 76% sunlit as its diameter shrinks from 8.5 to 5.9 arcsec.
Starwatch: Mercury in view
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The parsec in turn is defined to be a certain multiple of the astronomical unit original such that the parallax of a star as it appears from the Earth is 1 arcsecond.
The Speculist: Um, no
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Moving westwards below Leo's rear, it brightens from mag -0.6 to -1.2 and improves from 12 to 14 arcsec in diameter.
Starwatch: The February night sky
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Quite nice, with image/elevation data of the world down to 1 arcsecond.
GISS Interruptus « Climate Audit
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The scale of the Hubble/VLA/Chandra image is probably on the scale of arcminutes (1 arcminute = 60,000 milliarcseconds).
Archive 2008-08-22
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Jupiter's disc is 47 arcsec wide when the planet lies alongside the Moon on the night of the 16th.
Starwatch: the September night sky
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During February, it brightens from mag -4.1 to -4.2 and its gibbous disc swells from 15 to 18 arcsec.
Starwatch: The February night sky
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We propose to use FGS 1r to obtain parallaxes with an accuracy of 0.2 milliarcsecond for 9 main sequence stars with [Fe / H] < - 1.5.
SpaceRef Top Stories
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Whereas ground-based optical telescopes have sub-arcsecond** resolution, and Hubble is quoted as having a resolution of 0.085 arcseconds, single-dish radio telescopes can only get resolutions of a few arcminutes.
First Stellar Images
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A simpler way to express e to the power of arcsech x is (a) non-existent because such an expression is too complicated to deal with (b) xÀ1 þ (x-2 - 1) 1/2 (c) xÀ1 þ (x-2 þ 1) 1/2 (d) xÀ1 - (x-2 - 1) 1/2 8.
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In for - mulas and equations, they are abbreviated arcsinh or sinhÀ1, arccosh or coshÀ1, arctanh or tanhÀ1, arccsch or cschÀ1, arcsech or sechÀ1, and arccoth or cothÀ1 respectively.
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In astronomy, the preferred unit of measurement for such distances is the parsec, which is defined as the distance at which an object will appear to move one arcsecond of parallax when the observer moves one astronomical unit perpendicular to the line of sight to the observer.
Ann Aguirre » Blog Archive » A day in the life – blog Jeopardy
-
We propose to use FGS 1r to obtain parallaxes with an accuracy of 0.2 milliarcsecond for 9 main sequence stars with [Fe / H]
SpaceRef Top Stories
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Look for the Moon below Saturn and alongside Spica on the 14th when a telescope shows the planet's disc and rings to be 19 and 42 arcsec wide respectively.
Starwatch: The May night sky
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See, I'm just biased towards interferometers; -) ** One arcsecond is 1/60th of an arcminute, and one arcminute is 1/60th of a degree.
Archive 2009-02-25
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These are known as the hyperbolic arcsine, hyperbolic arccosine, hyperbolic arctangent, hyper - bolic arccosecant, hyperbolic arcsecant, and hyperbolic arccotangent.
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CHAPTER 4 Hyperbolic Functions 65 arcsinh x ¼ ln ½x þ ðx2 þ 1Þ1 = 2 Š arccosh x ¼ ln ½x þ ðx2 À 1Þ1 = 2 Š arctanh x ¼ 0: 5 ln ½ð1 þ xÞ = ð1 À xÞŠ arccsch x ¼ ln ½xÀ1 þ ðxÀ2 þ 1Þ1 = 2 Š arcsech x ¼ ln ½xÀ1 þ ðxÀ2 À 1Þ1 = 2 Š arccoth x ¼ 0: 5 ln ½ðx þ 1Þ = ðx À 1ÞŠ In these expressions, the values 0.5 represent exactly 1 = 2.
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Its cloud-banded disc is 37 arcsec wide at mid-month.
Starwatch: The February night sky
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The Very Long Baseline Array, stretching from Hawaii to the Caribbean, regularly produces images with milli-arcsecond resolution.
First Stellar Images
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At opposition, Jupiter is 594 million km distant and shows a cloud-banded 50 arcsec disc through almost any telescope.
Starwatch: The October night sky
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Calculations using Newtonian mechanics predict a precession of 532 arcsec per century.
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In for - mulas and equations, they are abbreviated arcsinh or sinhÀ1, arccosh or coshÀ1, arctanh or tanhÀ1, arccsch or cschÀ1, arcsech or sechÀ1, and arccoth or cothÀ1 respectively.
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