: For the history and development of the sextant see Reflecting instruments

For example, when a sextant is used on a moving ship, the image of both horizon and celestial object will move around in the field of view.

For a sun sight, the shades of the sextant overcome glare.

For this reason a sextant should be checked frequently for errors and adjusted accordingly.

For example, in 1940, Gerald Gallagher, a British colonial officer and licensed pilot, radioed his superiors to inform them that he had found a " skeleton ... possibly that of a woman ", along with an old-fashioned sextant box, under a tree on the island's southeast corner.

For his first EVA Collins did not leave the Gemini capsule, but stood up through the hatch with a device that resembled a sextant.

For ten years he actively participated in the work of the Astronomical Society, contributing papers on the theory of astronomical instruments, the aberration of light, the differential sextant, and the convertible pendulum.

For that reason, Admiral John Campbell, who conducted shipboard experiments with the lunar distance method, suggested a larger instrument and the sextant was developed.

( For details see inset, fig. 5.

For some significant new items see the pictures.

( For instance, see Example 2 of Section 5-5, on red cards in hands of 5.

For A good many seasons I've been looking at the naughty stuff on television, so the other night I thought I ought to see how immorality is doing on the other side of the fence in movies.

Last season, the Comedie's two principal experiments came to grief, and, in consequence, we can expect fairly soon to see still newer productions of Racine's `` Phedre '' and Moliere's `` School For Wives ''.

For all he saw or cared to see, this could have been a town in Italy, not the outskirts of Philadelphia.

: For a detailed presentation of the various points of view around the definition of " algorithm " see Algorithm characterizations.

For examples of simple addition algorithms specified in the detailed manner described in Algorithm characterizations, see Algorithm examples.

For some alternate conceptions of what constitutes an algorithm see functional programming and logic programming.

: For an example of the simple algorithm " Add m + n " described in all three levels see Algorithm examples.

( For an example, see Proto-Uralic language.

For the Hungarian clothing, see Atilla ( clothing ).

For other uses, see Attila ( disambiguation ).

* For a utilitarian analysis of religion, see The ( F ) Utility of Religion: Who Needs God ( s )?– A Prospective Bible for Non-Believers at http :// bradmusil. kramernet. org

For a table of accented Greek characters, see Greek diacritics: Computer encoding.

For Soviet transportation, see Transport in the Soviet Union.

* For Ibn Sina's life, see Ibn Khallikan's Biographical Dictionary, translated by de Slane ( 1842 ); F. Wüstenfeld's Geschichte der arabischen Aerzte und Naturforscher ( Göttingen, 1840 ).

* For a new understanding of his early career, based on a newly discovered text, see also: Michot, Yahya, Ibn Sînâ: Lettre au vizir Abû Sa'd.

* For relations, see relation-preserving automorphism.

For other uses, see Athena ( disambiguation ), Athene ( disambiguation ), Athina ( disambiguation ) and Pallas Athena ( disambiguation )

For cryptographers, a cryptographic " break " is anything faster than a brute force — performing one trial decryption for each key ( see Cryptanalysis ).

For more details of this early work, see Alpha particle # History of discovery and use.

For all ice shelfs see List of Antarctic ice shelves.

For a list of all Antarctic islands see List of Antarctic and sub-Antarctic islands.

For all ice shelfs see List of Antarctic ice shelves.

For nearby astronomical objects ( such as stars in our galaxy ) luminosity distance D < sub > L </ sub > is almost identical to the real distance to the object, because spacetime within our galaxy is almost Euclidean.

For this reason, astronomical position determination – measuring the direction of the plumbline by astronomical means – works fairly well provided an ellipsoidal model of the figure of the Earth is used.

For some lunar calendars, such as the Chinese calendar, the first day of a month is the day when an astronomical new moon occurs in a particular time zone.

For the year ( Y ) astronomical year numbering is used, thus 1 BC is 0, 2 BC is − 1, and 4713 BC is − 4712.

For accurate astronomical work on land, it was usual to observe sidereal time rather than solar time to measure mean solar time, because the observations of ' fixed ' stars could be measured and reduced more accurately than observations of the Sun ( in spite of the need to make various small compensations, for refraction, aberration, precession, nutation and proper motion ).

For decades after the discovery of GRBs, astronomers searched for a counterpart at other wavelengths: i. e., any astronomical object in positional coincidence with a recently observed burst.

For large astronomical bodies which are near-spherical due to self-gravitation, the tidal distortion produces a slightly prolate spheroid-i. e., an axially symmetric ellipsoid that is elongated along its major axis.

: For the terms " civil sunset " and " astronomical sunset ", see Twilight # Definitions

For typical seeing, the practical resolution limits are at mirror sizes well within existing mechanical limits, at a mirror diameter equal to the astronomical seeing parameter r < sub > 0 </ sub >-about 20 cm in diameter for visible observations under good conditions.

For geographical and cartographical poles on astronomical bodies other than Earth, see Poles of astronomical bodies.

For many years, a growing problem in astronomical research ( as in other academic disciplines ) was that the number of papers published in the major astronomical journals was increasing steadily, meaning astronomers were able to read less and less of the latest research findings.

For example, spectrograph and spectroscope have basically the same meaning, and in an astronomical context metallicity and abundance are also synonymous.

For most of its orbit it is even farther from the Sun than at present, with its aphelion estimated at 960 astronomical units ( 32 times Neptune's distance ), making it one of the most distant known objects in the Solar System other than long-period comets.

For example, the Guide Star Catalog II has entries on over 998 million distinct astronomical objects.

For example, an Earth-like planet at 1. 25 astronomical units from α Cen A ( with a revolution period of 1. 34 years ) would get Sun-like illumination from its primary, and α Cen B would appear 5. 7 to 8. 6 magnitudes dimmer (− 21. 0 to − 18. 2 ), 190 to 2700 times dimmer than α Cen A but still 2100 to 150 times brighter than the full Moon.

For placements where light pollution is of prime importance, such as an astronomical observatory parking lot, or a large city nearby an astronomical observatory, low pressure sodium is preferred.

For astronomical uses, reticles could be simple crosshair designs or more elaborate designs for special purposes.

For astronomical purposes, before 1925 a day was considered to start at noon rather than the previous midnight.

For his applications of IR detectors to astronomy, Coblentz is regarded as the founder of astronomical infrared spectroscopy.