The selenographic colongitude is the longitude of the morning terminator on the Moon, as measured in degrees westward from the prime meridian. The IAU recommends the "mean Earth/polar axis" system,[1] in which the prime meridian is the average direction (from the Moon's center) of the Earth's center.[2]. The longitude and latitude values associated with those points depend on our evolving understanding of the shape of the Moon and have been subject to revision. This can be thought of as the midpoint of the visible Moon as seen from the Earth. Selenographic coordinates are used to refer to locations on the surface of Earth's moon.Any position on the lunar surface can be referenced by specifying two numerical values, which are comparable to the latitude and longitude of Earth. The IAU recommends the "mean Earth/polar axis" system,[2] in which the prime meridian is the average direction (from the Moon's center) of the Earth's center. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda (λ). Sunrise occurs at the prime meridian when the Lunar phase reaches First Quarter, after one fourth of a lunar day. Thus, by the time of the Full Moon the colongitude increases to 90°; at Last Quarter it is 180°, and at the New Moon the colongitude reaches 270°.

Find out more, an offensive content(racist, pornographic, injurious, etc. To specify a location on a plane requires a map projection.

We have created a browser extension. In certain cases inaccuracies in the formulation of the first Cassini law occur. The SensagentBox are offered by sensAgent. Mösting is a small lunar impact crater that is located in the southeastern fringes of the Mare Insularum. Selenographic Coordinates. From this spot the Earth would always appear directly overhead, although the planet's position would vary slightly due to libration. Thus, by the time of the Full Moon the colongitude increases to 90°; at Last Quarter it is 180°, and at the New Moon the colongitude reaches 270°. Only one side of the Moon is visible from Earth because the Moon rotates on its axis at the same rate that the Moon orbits the Earth – a situation known as synchronous rotation, or tidal locking. The coordinates of this crater are defined as: The coordinate system has become precisely defined due to the Lunar Laser Ranging Experiment. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares. At this location the selenographic colongitude at sunrise is defined as 0°. Contact Us Longitude on the Moon is measured both east and west from its prime meridian. By convention, one of these, the Prime Meridian, which passes through the Royal Observatory, Greenwich, England, was allocated the position of 0° longitude. Selenographic coordinates are used to refer to locations on the surface of Earth's moon. The lunar north pole is the point in the Northern Hemisphere of the Moon where the lunar axis of rotation meets its surface.

Any position on the lunar surface can be referenced by specifying two numerical values, which are comparable to the latitude and longitude of Earth. Congratulations on this excellent venture… what a great idea! ○   Boggle.

Details can be found in the Apollo Landing Sites Slide Set compiled by James R. Zimbelman. Lunar distance, also called Earth–Moon distance, Earth–Moon characteristic distance, or distance to the Moon, is a unit of measure in astronomy. It is surrounded from the northeast to the southwest by the Montes Jura range. [3], From Infogalactic: the planetary knowledge core, IAU/IAG Working Group on Cartographic Coordinates and Rotational Elements: 2003, A Standardized Lunar Coordinate System for the Lunar Reconnaissance Orbiter, https://infogalactic.com/w/index.php?title=Selenographic_coordinates&oldid=1893599, Articles with Czech-language external links, Articles with unsourced statements from September 2015, Creative Commons Attribution-ShareAlike License, About Infogalactic: the planetary knowledge core. The selenographic colongitude is useful for this purpose. The protruding part of the range at the southwest end is named Promontorium Heraclides, while that at the northeast end is called Promontorium Laplace. (See also Earth's prime meridian.) See if you can get into the grid Hall of Fame ! Kopal Z., Carder R.W. The near side of the Moon is the lunar hemisphere that is permanently turned towards Earth, whereas the opposite side is the far side. Change the target language to find translations. Projecting your data is optional, but projecting your map is not. Mons Gruithuisen Gamma (γ) is a lunar dome that lies to the north of the crater Gruithuisen at the western edge of the Mare Imbrium. Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. Note that the Moon is nearly invisible from the Earth at New Moon phase except during a solar eclipse. Astronomers defined the fundamental location in the selenographic coordinate system by the small, bowl-shaped satellite crater 'Mösting A'. Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Sunrise occurs at the prime meridian when the Lunar phase reaches First Quarter, after one fourth of a lunar day. Note that the Moon is nearly invisible from the Earth at New Moon phase except during a solar eclipse. Selenographic coordinates are used to refer to locations on the surface of Earth's moon.Any position on the lunar surface can be referenced by specifying two numerical values, which are comparable to the latitude and longitude of Earth. The selenographic colongitude is the longitude of the morning terminator on the Moon, as measured in degrees westward from the prime meridian. Because of their relative simplicity, reference ellipsoids are used as a preferred surface on which geodetic network computations are performed and point coordinates such as latitude, longitude, and elevation are defined. It will enhance any encyclopedic page you visit with the magic of the WIKI 2 technology. The longitude gives the position east or west of the Moon's prime meridian, which is the line of longitude passing through the point on the lunar surface directly facing Earth. Specifically, it is the angle between a plane through the Prime Meridian and a plane through both poles and the location in question. Get XML access to reach the best products. Meridians connect points with the same longitude. Get XML access to fix the meaning of your metadata.

For precise applications, many coordinate systems have been defined for the Moon, each with a slightly different prime meridian.

Maps are flat, so your map must have a PCS in order to know how to draw. Roughly speaking, the Moon's prime meridian lies near the center of the Moon's disc as seen from Earth. In geography, latitude is a geographic coordinate that specifies the north–south position of a point on the Earth's surface. With all essential facts on the generalized rotation of the lunar globe on record in the preceding chapter, all prerequisites are now available for the adoption of a specific system of lunar coordinates. Privacy policy Briefly, geodetic latitude at a point is the angle formed by the vector perpendicular to the ellipsoidal surface from that point, and the equatorial plane. A geographic coordinate system is a coordinate system that enables every location on Earth to be specified by a set of numbers, letters or symbols. The morning terminator forms a half-circle across the Moon where the Sun is just starting to rise. For precise applications, many coordinate systems have been defined for the Moon, each with a slightly different prime meridian. English thesaurus is mainly derived from The Integral Dictionary (TID). The observer will need to know the location of the terminator to plan observations of selected features.

The latitude gives the position north or south of the lunar equator. Selenographic coordinates are used to refer to locations on the surface of Earth's moon. Note that the Moon is nearly invisible from the Earth at New Moon phase except during a solar eclipse. Anything past 90°E or 90°W would not be seen from Earth, except for libration, which makes 59% of the Moon visible. Roughly speaking, the Moon's prime meridian lies near the center of the Moon's disc as seen from Earth. By Habibullin S. Abstract. When no direction is specified, east is positive and west is negative.

A (geographic) meridian is the half of an imaginary great circle on the Earth's surface, terminated by the North Pole and the South Pole, connecting points of equal longitude, as measured in angular degrees east or west of the Prime Meridian. Each square carries a letter. The selenographic colongitude is the longitude of the morning terminator on the Moon, as measured in degrees westward from the prime meridian.

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