Meridian Circle
Related Category: Astronomy: General
see transit instrument.
More on Meridian Circle
Transit Instrument - or transit, telescope devised to observe stars as they cross the meridian and used for determining time.
Meridian Transit
A meridian transit occurs when an object moves across the meridian - an imaginary great circle on the celestial sphere that passes through the celestial poles and an observer's zenith.
Meridian (geography)
This article is about the geographical concept. For other uses of the word, see Meridian.
The prime meridian at Greenwich, England ...
Meridian astronomy
What is meridian astronomy?
We can all remember having geography lessons and learning about latitude and longitude (even though most of us have forgotten which is which!).
Meridian Brothers...........
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Prime Meridian
The zero point for longitude on the , defined as the longitude of the Greenwich Royal Observatory in England.
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Meridian is a great circle on the celestial sphere that passes through your zenith and also through both celestial poles. Your meridian line extends all the way around the Earth (and intersects your nadir, on the other side).
Meridian
A great circle passing through the Earth's rotational poles and through the zenith (the point directly overhead) of a location on the Earth.
Reference: ...
Meridian , also known as channel, in traditional Chinese medicine, is the common name of vessel, and collaterals.
meridian: a great circle (or, more usually, half of a great circle) passing through the N and S poles. The same as a line of longitude.
meridian
an imaginary circle on the celestial sphere that connects the zenith to the north (or south) celestial pole
meteor ...
Meridian The local meridian is an imaginary line running directly overhead from north to south. The right ascension on the meridian equals local sidereal time.
Meridian
An imaginary north/south line passing through the zenith.
Newtonian
See reflector.
Meridian- an imaginary line on the sky that runs due north and south and passes through your zenith
Meson- matter that is composed of two quarks ...
Meridian The great circle passing through the celestial poles and the observer's zenith.
Meteor The incandescent trail of a meteoroid as it enters Earth's atmosphere.
Meteorite A meteoroid that reaches Earth's surface.
meridian
The imaginary line that runs from the horizon to the zenith while looking directly south. When an object in on the meridian, it is at its highest point in its path across the sky.
Meridians -- Great circles that pass through both the north and south poles, also called lines of longitude.
Meridian
an imaginary circle drawn through the North and South poles of the celestial equator.
Meridian
(a) Theoretical north-south line on the Earth's surface, or an extension of that line onto the night sky, connecting the observer's zenith with the celestial pole and the horizon. The meridian is used to state directional bearings.
Meridian. The imaginary line that passes from north to south horizons via the zenith.
MERIDIAN
The meridian is an imaginary north-south line in the sky that passes through the observer's zenith.
noon (or meridian) dial or noon line: a dial which has only one hour line, for noon. It has a nodus rather than a full gnomon.
Meridian, celestial:
The great circle passing through the north and the south points of the horizon and the observer's zenith.
meridian: the imaginary north-south line that passes directly overhead (through the zenith).
Meridian always goes through due North, zenith, and due South points.
Altitude of zenith = 90° (straight overhead) always.
Altitude of celestial pole = observer's latitude.
Meridiani Planum in Color
This color image shows the martian landscape at Meridiani Planum, where the Mars Exploration Rover Opportunity successfully landed at 9:05 p.m. PST on Saturday.
Meridiani Planum is a broad outcropping of a mineral that usually forms in the presence of liquid water. The area was thought to have deposits of an iron oxide mineral - gray hematite.
prime meridian
hour circle through 1,
Greenwich celestial meridian,
local celestial meridian ...
Every meridian must cross the equator. Since the equator is a circle, we can divide it--like any circle--into 360 degrees, and the longitude φ of a point is then the marked value of that division where its meridian meets the equator.
Alfecca Meridiana = Alpha Coronae Australis
Beta CrA = Beta Coronae Australis
Eps CrA = Epsilon Coronae Australis
Corona Borealis ...
Os Piscis Meridiani; Os Piscis Notii; Difda al Auwel, the "First Frog".
Alpha Piscis Austrini
HR 8728
HD 216956 ...
Greenwich meridian - The meridian of longitude passing through the site of the old Royal Greenwich Observatory, near London; origin point from which longitude is measured on the earth.
Auroral Meridian.-It is a common belief that the summit of an auroral arc is to be looked for in the observer's magnetic meridian. On any theory it would be rather extraordinary if this were invariably true.
A fictitious meridian that rotates independently of the Earth at the uniform rate implicitly defined by Terrestrial Dynamical Time (TDT). The ephemeris meridian is 1.002738T east of the Greenwich meridian, where T = TDT-UT1. [S92]
Ephemeris Second ...
The Carslberg Meridian Telescope, a fully automated transit telescope on La Palma observes up to 200,000 stars a night, capturing data on a 2k x 2k CCD.
Credit: Dafydd Wyn Evans ...
Meridian line goes from north to south and passes through your zenith. Objects on the meridian are at their highest elevation above the ground.
CENTRAL MERIDIAN PASSAGE (CMP). The passage of an ACTIVE REGION or other feature across the longitude meridian that passes through the apparent center of the solar DISK. CHROMOSPHERE.
Though the prime meridian always divides the Moon down the middle, regardless of the phase, there's nothing like a quarter Moon to illuminate the two hemispheres.
Mars has a prime meridian, defined as passing through the small crater Airy-0. In the future, perhaps Mars could have time zones defined at regular intervals from the prime meridian, as on Earth.
The International Meridian Conference finally settled matters in 1884 when 25 delegations (one of them was from then independent Hawaii) voted to divide the world into 24 time zones.
The Martian Central Meridian (CM), an imaginary line passing through the planetary poles of rotation and bisecting the planetary disk, is used to define the areographic longitudes on the disk during an observing session.
planetographic Referring to positions on a planet measured in latitude from the planet's equator and in longitude from a reference meridian. planetoid = asteroid. See planet.
central meridian
Cepheid variable
Cepheus (constellation)
Ceres (minor planet 1)
Cerro Tololo Inter-American Observatory
Cetus (constellation)
CH Cygni
CH star
Chamberlin-Moulton planetesimal hypothesis
Chameleon (constellation) ...
We've narrowed the location down to its line of longitude, or meridian, we now need to find the approximate line of latitude at which the event will occur so we can then home in on our site.
Alfecca Meridiana Alpha Coronae Australis
Alfirk Beta Cephei
Algedi Alpha Capricorni
Al Giedi Alpha Capricorni
Algenib Alpha Persei
Algieba Gamma Leonis
Algol Beta Persei
Algorab Delta Corvi
Alhajoth Alpha Aurigae
Alhena Gamma Geminorum ...
February 7 - The One Meridian Plaza fire in Philadelphia, Pennsylvania kills 3 firefighters and destroys 8 floors of the building.
In certain quack theories of oriental medicine, such as qi gong (pronounced chee gung) something called qi is believed to circulate through the body on specific, mappable pathways called meridians.
Technically, the sidereal time is defined as the length of time since the vernal equinox has crossed the local celestial meridian.
A nautical mile is defined as 1852 meters, but is also (not accidentally) one minute of angle along a meridian on the Earth. Sextants can be read accurately to within 0.2 arcminutes.
Why should dune ripples in Meridiani Planum, in Mars' southern hemisphere, be so different to ripples at Nili Patera in the north?
Airy installed a transit (a precise surveying device) at Greenwich, England, which was used to define the zero degree meridian of the Earth (zero-degrees longitude).
In a time zone everyone agrees to set their clocks to mean solar time for a meridian that runs approximately through the center of that time zone. Time zones are centered on meridians equaling whole number multiples of 15 degrees.
The telescope would be mounted between massive walls, each 70 feet long and 50 feet high, so that it could be turned only toward that part of the sky which lay near the meridian-that is to say, the north-south line.
The other coordinate is called right ascension, and it is measured eastward from a somewhat arbitrary "prime meridian" on the sky. The "prime meridian" passes through the position of the Sun at the time of the vernal equinox.
the crossing of a celestial body over the meridian
2. the crossing of a celestial body in front of another
U
umbra the total part of a shadow Universal Time (UT) local time on the Greenwich meridian
Z ...
The Sun's meridional flow - the flow of material along meridian lines from the equator toward the poles at the surface and from the poles to the equator deep inside - must also play an important role in the Sun's magnetic dynamo.
That assumption is that the constellation in question is straddling the meridian, that is, is due south of the viewer. In practice this is not always the case, but it is a convenient convention.
Assume first (A) that there is present an initial poloidal magnetic field (one lying in meridian planes). Suppose next that the innermost part of the field line is embedded in a fluid rotating more rapidly than the outer parts of the fluid.
In 2371, Lieutenant Jadzia Dax's body acted as a singularity during the planet Meridian's dimensional shifting. Dax's presence during the shift destabilized the planet's quantum matrix, threatening complete destruction of Meridian.
It is measured by the interval between two successive transits of a celestial body over the same meridian, and takes a specific name from that of the body.
 See also: Time, Earth, Sun, Second, Degree
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