The Amateur Astronomer's Introduction to the Celestial Sphere.
Prime vertical, the vertical circle perpendicular to a meridian. The term meridian comes from the Latin meridies, which means both "midday" and "south", as the celestial equator appears to tilt southward from the Northern Hemisphere. An object's right ascension and the local sidereal time can be used to determine the time of its culmination (see hour angle). At culmination, the object contacts the upper meridian and reaches its highest point in the sky. On any given (sidereal) day/night, a celestial object will appear to drift across, or transit, the observer's upper meridian as Earth rotates, since the meridian is fixed to the local horizon. Another way, the meridian is divided into the local meridian, the semicircle that contains the observer's zenith and both celestial poles, and the opposite semicircle, which contains the nadir and both poles. The observer's upper meridian passes through the zenith while the lower meridian passes through the nadir. In the horizontal coordinate system, the observer's meridian is divided into halves terminated by the horizon's north and south points. There are several ways to divide the meridian into semicircles. The intersection of this plane with Earth's surface is the geographical meridian, and the intersection of the plane with the celestial sphere is the celestial meridian for that location and time. For a location not at a geographical pole, there is a unique meridian plane in this axial-pencil through that location. Meridians, celestial and geographical, are determined by the pencil of planes passing through the Earth's rotation axis. Consequently, it contains also the north and south points on the horizon, and it is perpendicular to the celestial equator and horizon. In astronomy, the meridian is the great circle passing through the celestial poles, as well as the zenith and nadir of an observer's location. See the estimate, review home details, and search for homes nearby. An observer's upper meridian, a semicircle, passes through their zenith and the north and south points of their horizon the observer's local meridian is the semicircle that contains their zenith and both celestial poles. 5738 N Lichfield Ave, Meridian, ID 83646 is a 3,620 sqft, 5 bed, 4 bath home sold in 2019. Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.The meridian on the celestial sphere. Britannica Beyond We’ve created a new place where questions are at the center of learning. 
100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians. #The meridian how to#
COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today. Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more. 
From tech to household and wellness products. Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.This Time in History In these videos, find out what happened this month (or any month!) in history.#WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.
0 kommentar(er)
