Tips: browse the semantic fields (see From ideas to words) in two languages to learn more.

Congratulations on this excellent venture… what a great idea! 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. This can be thought of as the midpoint of the visible Moon as seen from the Earth. The coordinates of this crater are defined as: The coordinate system has become precisely defined due to the Lunar Laser Ranging Experiment. Get XML access to fix the meaning of your metadata. As the Moon continues in its orbit, this line advances in longitude. A projected coordinate system (PCS) is a GCS that has been flattened using a map projection. Selenographic coordinates are used to refer to locations on the surface of Earth's moon. The lunar distance is approximately 400000 km, or a quarter of a million miles. The Lunar Orbiter 2 robotic spacecraft, part of the Lunar Orbiter Program, was designed primarily to photograph smooth areas of the lunar surface for selection and verification of safe landing sites for the Surveyor and Apollo missions. When no direction is specified, east is positive and west is negative. The low angle of incidence of arriving sunlight tends to pick out features by the sharp shadows they cast, thus the area near the terminator is usually the most favorable for viewing or photographing lunar features through a telescope. Over 10 million scientific documents at your fingertips. Longitude on the Moon is measured both east and west from its prime meridian. IAU/IAG Working Group on Cartographic Coordinates and Rotational Elements: 2003, A Standardized Lunar Coordinate System for the Lunar Reconnaissance Orbiter. Each is also the same length, being half of a great circle on the Earth's surface and therefore measuring 20,003.93 km.

Meridians connect points with the same longitude. The coordinates of this crater are defined as: The coordinate system has become precisely defined due to the Lunar Laser Ranging Experiment. (See also Earth's prime meridian.) ○   Anagrams This can be thought of as the midpoint of the visible Moon as seen from the Earth. Selenographic Coordinates. 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.

Letters must be adjacent and longer words score better. 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. The selenographic colongitude is useful for this purpose. Because most planets (except Mercury) and many small Solar System bodies have orbits with only slight inclinations to the ecliptic, using it as the fundamental plane is convenient. The coordinates of this crater are defined as: The coordinate system has become precisely defined due to the Lunar Laser Ranging Experiment. As an Amazon Associate Love the Night Sky earns from qualifying purchases, Improve your moon observing skills, with our.



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