Definitions in Astronomy and Navigation Made EasyWilliam Blackwood & Sons, 1865 - 29 páginas |
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Definitions in Astronomy and Navigation Made Easy John Bradley Harbord Sin vista previa disponible - 2016 |
Términos y frases comunes
actual sun's centre altitude passing Astronomical Day Axis body intercepted book is admirably book of reference celestial concave passing celestial meridian CELESTIAL SPHERE Chaplain and Naval CIRCLE CO-ORDINATES circle of altitude circle of declination Civil Day declination passing definitions in navigation diurnal motion east point ecliptic equinoctial figure given the definitions Glossary of Navigation H.M.S. Britannia Harbord's Glossary Heavenly Body hour angle hour circle passing illustrate your definitions J. B. HARBORD latitude Liverpool College loose notions Mean Solar Day mean sun Nautical Astronomy Naval Cadets Naval Instructor north and south north pole OPINIONS-Continued plane point of Aries point of definition POLAR CO-ORDINATES polar distance primary great circle prime vertical PXx the hour reckoning westward right ascension Royal Naval College Secondary Great Circles Ship for Naval Sidereal Day south points St John's College SURFACE THREE SYSTEMS Training Ship vertical circle west point WILLIAM BLACKWOOD young naval officer zenith ရာ
Pasajes populares
Página 14 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another.
Página 17 - The longitude of a heavenly body is the arc of the ecliptic intercepted between the first point of Aries and the circle of latitude passing...
Página 16 - ... equator intercepted between the first point of Aries and the circle of declination passing through the place of the body in the celestial concave.
Página 19 - Mean Solar Day is the interval between two successive transits of the mean sun over the same meridian ; it begins when the mean sun is on the meridian.
Página 19 - The sidereal day is the interval between two successive transits of the first point of Aries over the same meridian.
Página 17 - Azimuth is the angular distance of a celestial object from the north or south point of the horizon (according as it is the north or south pole which is elevated), when the object is referred to the horizon by a vertical circle ; or it is the angle comprised between two vertical planes — one passing through the elevated pole, the other through the object.
Página 19 - The interval between two successive transits of the actual sun's centre over the same meridian ; it begins when that point is on the meridian. The apparent solar day is variable in length from two causes : first, the sun does not move uniformly in the ecliptic — its apparent path sometimes describing an arc of 57', and at other times an arc of 61...
Página 17 - Owing to the obliquity of the ecliptic — the angle at which the ecliptic is inclined to the celestial equator...
Página 19 - Month. 27-32166 days, the interval between two successive passages of the Moon through the same point in her orbit relative to the fixed stars. Sidereal Noon. The instant when the First Point of Aries is on the meridian at upper CULMINATION (qv), indicated by 0 hours local sidereal time. Sidereal Period. The interval between two successive positions of a celestial body at the same point with reference to the fixed stars; the same applied to an artificial satellite as seen from the Earth, although...