Definitions in Astronomy and Navigation Made EasyWilliam Blackwood & Sons, 1865 - 29 σελίδες |
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Σελίδα 12
... with the Ecliptic ; a a ' the Intersection of the Body's Circles of Altitude with the Horizon ; Y Y ' y y ' ιν b b ' the same points for a second Body ; M the Mean Sun. The projections most generally used are those on the horizon 12.
... with the Ecliptic ; a a ' the Intersection of the Body's Circles of Altitude with the Horizon ; Y Y ' y y ' ιν b b ' the same points for a second Body ; M the Mean Sun. The projections most generally used are those on the horizon 12.
Σελίδα 19
... Mean Solar Day : The interval between two successive transits of the mean sun over the same meridian ; the Mean Sun being a fictitious body which is conceived to move uniformly in the equinoctial with the mean velocity which the real ...
... Mean Solar Day : The interval between two successive transits of the mean sun over the same meridian ; the Mean Sun being a fictitious body which is conceived to move uniformly in the equinoctial with the mean velocity which the real ...
Σελίδα 20
... sun's centre , reckon- ing westward . ( 3. ) Mean Time : The angle at the pole of the hea- vens between the celestial meridian and the hour circle passing through the mean sun , reckoning westward . Equation of Time : The difference ...
... sun's centre , reckon- ing westward . ( 3. ) Mean Time : The angle at the pole of the hea- vens between the celestial meridian and the hour circle passing through the mean sun , reckoning westward . Equation of Time : The difference ...
Σελίδα 21
... Mean Solar Day ; the term when used alone is usually understood to refer to the Mean Solar Day . ANNUAL TIME . Year : The period in which the earth makes a re- volution in her orbit round the sun ... sun in the ecliptic . Sidereal Year : The ...
... Mean Solar Day ; the term when used alone is usually understood to refer to the Mean Solar Day . ANNUAL TIME . Year : The period in which the earth makes a re- volution in her orbit round the sun ... sun in the ecliptic . Sidereal Year : The ...
Σελίδα 27
... sun X , PM the hour circle passing through the mean sun M ; then QP is sidereal time , QP is apparent time 27.
... sun X , PM the hour circle passing through the mean sun M ; then QP is sidereal time , QP is apparent time 27.
Άλλες εκδόσεις - Προβολή όλων
Definitions in Astronomy and Navigation Made Easy John Bradley Harbord Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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.
Σελίδα 19 - The sidereal day is the interval between two successive transits of the first point of Aries over the same meridian.
Σελίδα 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.
Σελίδα 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...
Σελίδα 17 - Owing to the obliquity of the ecliptic — the angle at which the ecliptic is inclined to the celestial equator...
Σελίδα 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...