Great circle
For the Brisbane bus routes known collectively as the Great Circle Line (598 & 599), see the list of TransLink (Brisbane) services
A great circle on a sphere ...
great circle: a circle on the surface of a sphere whose diameter is equal to the diameter of that sphere. Thus the circle has the same centre as the sphere.
Great circle A circle formed on the surface of a sphere which is formed by the intersection of a plane which passes through the centre of a sphere. A great circle path is the shortest distance on a spherical surface between two points.
H ...
Great circle -- An imaginary circle on the surface of a sphere whose center is at the center of the sphere.
Great circle. A circle on the surface of a sphere whose plane passes through the centre of that sphere.
H
Halo, galactic. A roughly spherical shaped region around the main part of the Galaxy.
Great Circle - A circle that bisects a sphere. The celestial equator and ecliptic are examples of great circles ...
GREAT CIRCLE
A great circle is an imaginary circle on the surface of a sphere whose plane passes through the center of the sphere.
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great circle through
galactic poles so that
angle to celestial
north pole is 123° ...
great circle - (n.)
The intersection of a plane that passes through the center of a sphere with the surface of that sphere; the largest possible circle that can be drawn on the surface of a sphere.
greenhouse effect - (n.) ...
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: ...
A great circle drawn on a terrestrial globe, making an angle of 23° 28· with the equator; -- used for illustrating and solving astronomical problems.
E*clip"tic, a. [L. eclipticus belonging to an eclipse, Gr. . See Eclipse.]
1.
A great circle passing through the celestial poles - i.e., perpendicular to the celestial equator.
Hourglass Nebula
A compact H II region in the center of M8.
The great circle on the celestial sphere which passes through the celestial poles and the zenith of the observer. [H76]
Celestial Poles ...
What is the great circle on the celestial sphere halfway between the celestial poles?
What connection is there between the North and South Pole and the earth's axis?
What is meant by the sigma point?
What is the equatorial coordinate system?
in astronomy, the great circle on the celestial sphere that passes from the observer's zenith through a given celestial body. In the altazimuth coordinate system the altitude of a body is measured along its vertical circle.
Prime vertical:
A great circle on the celestial sphere from the east to the west and passing through the zenith.
Prominence:
Cloud of gas elevated above the solar surface.
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).
ecliptic: The great circle formed by the intersection of the plane of the earth's orbit with the celestial sphere, or the apparent annual path of the sun in the heavens. [16] ...
parallel A circle on the surface of the earth, parallel to the plane of the equator and connecting all points of equal latitude, or a circle parallel to the primary great circle of a sphere or spheroid; ...
celestial equator great circle that is a projection of the Earth's equator onto the sky. Always intercepts horizon at exact East and exact West point. Its meridian altitude = (90 degrees - observer's latitude).
In astronomy the horizon is that great circle of the sphere the plane of which is at right angles to the direction of the plumb line.
From south to north, Theta, Beta (Menkalinan), and Delta Aurigae are in remarkable alignment almost exactly along the "solstitial colure," the great circle in the sky that connects the celestial poles with the summer and winter solstices.
Instead, they follow a great circle on Earth's surface. On the curved surface of a sphere, such a path is always the shortest distance between two points.
A meridian is an imaginary great circle on the celestial sphere that passes through the north and south celestial poles and an observer's zenith. The Lower Meridian is the semi-circular segment of the meridian that is below the observer's horizon.
the alterations of the measured positions of the stars resulting from the movement of the points of intersection of the ecliptic (the plane of the Earth's orbit) and of the celestial equator (the great circle formed in the sky by the projection ...
The hemispheric boundary is not parallel to the equator but roughly follows a great circle inclined to it by about 30 . The boundary is broad and irregular and slopes downward toward the north.
The Martian surface can be divided into two approximately hemispherical provinces by a great circle inclined at about 30° to the equator.
For instance, Saturn's orbital motion produces a slow, almost constant motion along a great circle on the sky, but Earth's orbital motion superimposes on this a cyclic motion back and forth on the sky.
Galactic equator The great circle along the line of the Milky Way, marking the central plane of our galaxy.
Galaxy A large disk or ball of billions of stars and nebulae. They are the largest individual structures in the Universe.
It scanned the entire celestial sphere every 6 months, with a great circle being scanned every satellite revolution. After about 2 months of operation, both of the satellite's tape recorders failed.
celestial equator - A great circle on the celestial sphere 90° from the celestial poles; the circle of intersection of the celestial sphere with the plane of the earth's equator.
VERTICAL CIRCLE - Arc of a great circle drawn from the zenith through a star and perpendicular to the horizon.
These 2 great circles intersect at 2 points. As the planet travels around its orbit, at one of the intersection points it will pass from below the ecliptic plane to above it (i.e. northward). This point is called the ascending node.
aequator of the terrestrial globe, in a single second (that is, in about the time in which one walking quickly will be able to advance only a single pace) can acomplish a quarter of a British mile (of which sixty equal one degree of a great circle on ...
The Prime Meridian and the opposite 180th meridian , which the International Date Line generally follows, form a great circle that divides the Earth into the Eastern Hemisphere and Western Hemispheres....
and making the isthmus of Suez ...
Disputation on the Three Comets of the Year 1618, which discussed the nature of a comet that had appeared late in November of the previous year. Grassi concluded that the comet was a fiery body which had moved along a segment of a great circle at a ...
 See also: Circle, Earth, Sun, Equator, Second
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