observer's latitude
1observer — (ob sèr vé) v. a. 1° Se conformer à ce qui est prescrit par quelque loi, par quelque règle (premier sens, puisque le latin observare signifie garder autour). • J observerai, seigneur, ces avis importants, CORN. Nicom. III, 1. • Prends un… …
2astronomical latitude — n. the angle between the direction of gravity at the observer s position and the plane of the celestial equator * * * …
3astronomical latitude — n. the angle between the direction of gravity at the observer s position and the plane of the celestial equator …
4Circumpolar star — The northern circumpolar stars revolving around the north celestial pole. Note that Polaris, the bright star near the center, is almost stationary. Polaris is circumpolar and can be seen at all times of the year. (The graphic shows how the… …
5Meridian altitude — is an astronomical navigation method of calculating an observer s latitude. Contents 1 Principle 2 Methodology 3 See also 4 References …
6Declination — For other uses, see Declination (disambiguation). In astronomy, declination (abbrev. dec or δ) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is… …
7Pytheas — of Massilia (Ancient Greek Πυθέας ὁ Μασσαλιώτης), 4th century BC, was a Greek geographer and explorer from the Greek colony Massilia (today Marseille, France). He made a voyage of exploration to northwestern Europe possibly no earlier than around …
8Culmination — In astronomy, the culmination of a planet, star, constellation, etc. is the altitude (or elevation angle) reached when the object transits over an observer s meridian[citation needed]. During a sidereal day, an astronomical object will cross the… …
9Daytime (astronomy) — Earth daylight 13:00 UTC On Earth, daytime is roughly the period on any given point of the planet s surface during which it experiences natural illumination from indirect or (especially) direct sunlight. Other planets that rotate in relation to a …
10Planisphere — For the tetralogy of songs by Justice, see Justice discography. A plastic planisphere. A planisphere is a star chart analog computing instrument in the form of two adjustable disks that rotate on a common pivot. It can be adjusted to display the… …
