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" ... meridian will move through a complete circumference, or arc of 360°, in the same time ; hence angles are sometimes measured in time, thus 24 h. = 360°, 1 h. = 15°. § 7. The hour angle of a heavenly body is the inclination of the hour circle (circle... "
The Elements of Plane Trigonometry - Page 41
by Henry Nathan Wheeler - 1878 - 112 pages
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The Elements of Theoretical and Descriptive Astronomy: For the Use of ...

Charles Joyce White - Astronomy - 1872 - 300 pages
...complement of the altitude. The azimuth of a celestial body is the inclination of the vertical circle which passes through the body to the celestial meridian, and is measured by the arc of the celestial horizon ineluded between this vertical circle and the celestial meridian. Azimuth may be reckoned from...
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Plane and Spherical Trigonometry

Henry Nathan Wheeler - Trigonometry - 1876 - 204 pages
...circumference, or arc of 360°, in the same time ; hence angles are sometimes measured in time, thus 24 h. — 360°, 1 h. = 15°. § 7. The hour angle of...angle of the sun is 30° or 2 h., the solar time is 2 o'c. PM ; and when the hour angle is — SO3 the time is 10 o'c. AM § 8. The sensible horizon of an...
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Plane and Spherical Trigonometry

Henry Nathan Wheeler - Trigonometry - 1882 - 244 pages
...or arc of 360°, in the same time ; hence angles are sometimes measured in time, thus 24 h. = 3G0°, 1 h. = 15°. § 7. The hour angle of a heavenly body...angle of the sun is 30° or 2 h., the solar time is 2 o'c. P. м. ; and when the hour angle is — 30Э the time is 10 o'c. A. м. § 8. The sensible horitton...
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The Elements of Theoretical and Descriptive Astronomy: For the Use of ...

Charles Joyce White - Astronomy - 1884 - 298 pages
...transit when it crosses the lower branch. The hour angle of a heavenly body is the inclination of the circle of declination which passes through the body...and is measured by the arc of the celestial equator included between these two circles. Hour angles are reckoned positively towards the west, from the...
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Plane and Spherical Trigonometry

Henry Nathan Wheeler - Trigonometry - 1890 - 248 pages
...circumference, or arc of 360°, in the same time ; hence angles are sometimes measured in time, thus 24 h. = 360°, 1 h. = 15°. § 7. The hour angle of a...the sun is 30° or 2 h., the solar time is 2 o'cp м. ; and when the hour angle is — 30° the time is 10 o'c. AM § 8. The sensible horizon of an observer...
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A Treatise on Navigation and Nautical Astronomy: Including the Theory of ...

William Carpenter Pendleton Muir - Nautical astronomy - 1906 - 756 pages
...sphere, is the inclination of the hour (or declination) circle passing through the body, or point, to the celestial meridian, and is measured by the arc of the equinoctial intercepted between these two circles. Hour angles are properly reckoned from the upper...
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A Treatise on Navigation and Nautical Astronomy: Including the Theory of ...

William Carpenter Pendleton Muir - Nautical astronomy - 1906 - 754 pages
...sphere, is the inclination of the hour (or declination) circle passing through the body, or point, to the celestial meridian, and is measured by the arc of the equinoctial intercepted between these two circles. Hour angles are properly reckoned from the upper...
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The Elements of Theoretical and Descriptive Astronomy: For the Use of ...

Charles Joyce White - Astronomy - 1920 - 350 pages
...vernal equinox, from Oh. to 24h. The hour angle of a heavenly body is the inclination of the hour circle which passes through the body to the celestial meridian,...and is measured by the arc of the celestial equator included between these two circles. Hour angles are reckoned positively towards the west, from the...
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