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- Lunar_distance_(astronomy) abstract "In astronomy, a lunar distance (LD) is a measurement of the distance from the Earth to the Moon. The average distance from the center of the Earth to the center of the Moon is 384,400 km (238,900 mi). One astronomical unit is about 389 LD. The actual distance varies over the course of the orbit of the moon, from 363,104 km (225,622 mi) at the perigee and 405,696 km (252,088 mi) at apogee, resulting in a differential range of 42,592 km (26,465 mi).Millimeter-precision measurements of the lunar distance are made by measuring the time taken for light to travel between LIDAR stations on the Earth and retroreflectors placed on the Moon. Lunar laser ranging measurement data is available from the Paris Observatory Lunar Analysis Center, and the active stations.The Moon is spiraling away from the Earth at an average rate of 3.8 cm (1.5 in) per year, as detected by the Lunar Laser Ranging Experiment. The recession rate is considered anomalously high. By coincidence, the diameter of corner cubes in retroreflectors on the Moon is also 3.8 cm (1.5 in).The tidal dissipation rate has varied during the Earth's geological history.The first person to measure the distance to the Moon was the 2nd-century-BC astronomer and geographer Hipparchus, who exploited the lunar parallax using simple trigonometry, measuring the distance as 400,000 kilometers. He was approximately 26,000 km (16,000 mi) off the actual distance, an error of about 6.8%.The NASA Near Earth Object Catalog includes the distances of asteroids and comets measured in Lunar Distances.".
- Lunar_distance_(astronomy) thumbnail Lunar_perigee_apogee.png?width=300.
- Lunar_distance_(astronomy) wikiPageID "899115".
- Lunar_distance_(astronomy) wikiPageLength "4371".
- Lunar_distance_(astronomy) wikiPageOutDegree "26".
- Lunar_distance_(astronomy) wikiPageRevisionID "676520945".
- Lunar_distance_(astronomy) wikiPageWikiLink Accuracy_and_precision.
- Lunar_distance_(astronomy) wikiPageWikiLink Apogee.
- Lunar_distance_(astronomy) wikiPageWikiLink Apsis.
- Lunar_distance_(astronomy) wikiPageWikiLink Astronomical_unit.
- Lunar_distance_(astronomy) wikiPageWikiLink Astronomy.
- Lunar_distance_(astronomy) wikiPageWikiLink Category:Orbit_of_the_Moon.
- Lunar_distance_(astronomy) wikiPageWikiLink Category:Units_of_length.
- Lunar_distance_(astronomy) wikiPageWikiLink Category:Units_of_measurement_in_astronomy.
- Lunar_distance_(astronomy) wikiPageWikiLink Corner_reflector.
- Lunar_distance_(astronomy) wikiPageWikiLink Earth.
- Lunar_distance_(astronomy) wikiPageWikiLink File:Earth-Moon.png.
- Lunar_distance_(astronomy) wikiPageWikiLink Hipparchus.
- Lunar_distance_(astronomy) wikiPageWikiLink LIDAR.
- Lunar_distance_(astronomy) wikiPageWikiLink Lidar.
- Lunar_distance_(astronomy) wikiPageWikiLink Lunar_Laser_Ranging_Experiment.
- Lunar_distance_(astronomy) wikiPageWikiLink Lunar_Laser_Ranging_experiment.
- Lunar_distance_(astronomy) wikiPageWikiLink Moon.
- Lunar_distance_(astronomy) wikiPageWikiLink Orbit_of_the_Moon.
- Lunar_distance_(astronomy) wikiPageWikiLink Orbit_of_the_moon.
- Lunar_distance_(astronomy) wikiPageWikiLink Parallax.
- Lunar_distance_(astronomy) wikiPageWikiLink Perigee.
- Lunar_distance_(astronomy) wikiPageWikiLink Retroreflector.
- Lunar_distance_(astronomy) wikiPageWikiLink Trigonometry.
- Lunar_distance_(astronomy) wikiPageWikiLink File:Lunar_perigee_apogee.png.
- Lunar_distance_(astronomy) wikiPageWikiLink File:Moon-Earth_distance,_Moon_phases.gif.
- Lunar_distance_(astronomy) wikiPageWikiLink File:Moons_orbit_-_Variation_of_distance_en.png.
- Lunar_distance_(astronomy) wikiPageWikiLinkText "Earth-Moon distance".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "LD".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "Lunar Distances".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "Lunar distance (astronomy)".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "Lunar distance".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "Lunar distances".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "average distance to the Moon".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "different sizes".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "distance to the Moon".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "distance".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "lunar distance".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "lunar distances".
- Lunar_distance_(astronomy) wikiPageWikiLinkText "the radius of the Moon's orbit".
- Lunar_distance_(astronomy) hasPhotoCollection Lunar_distance_(astronomy).
- Lunar_distance_(astronomy) wikiPageUsesTemplate Template:About.
- Lunar_distance_(astronomy) wikiPageUsesTemplate Template:Convert.
- Lunar_distance_(astronomy) wikiPageUsesTemplate Template:Moon-stub.
- Lunar_distance_(astronomy) wikiPageUsesTemplate Template:Reflist.
- Lunar_distance_(astronomy) subject Category:Orbit_of_the_Moon.
- Lunar_distance_(astronomy) subject Category:Units_of_length.
- Lunar_distance_(astronomy) subject Category:Units_of_measurement_in_astronomy.
- Lunar_distance_(astronomy) hypernym Measurement.
- Lunar_distance_(astronomy) type Company.
- Lunar_distance_(astronomy) comment "In astronomy, a lunar distance (LD) is a measurement of the distance from the Earth to the Moon. The average distance from the center of the Earth to the center of the Moon is 384,400 km (238,900 mi). One astronomical unit is about 389 LD.".
- Lunar_distance_(astronomy) label "Lunar distance (astronomy)".
- Lunar_distance_(astronomy) sameAs Lunar_Distance.
- Lunar_distance_(astronomy) sameAs Distancia_a_la_luna.
- Lunar_distance_(astronomy) sameAs فاصله_قمری.
- Lunar_distance_(astronomy) sameAs Distance_lunaire.
- Lunar_distance_(astronomy) sameAs Jarak_bulan_(astronomi).
- Lunar_distance_(astronomy) sameAs Distanza_lunare.
- Lunar_distance_(astronomy) sameAs 地球と月の距離.
- Lunar_distance_(astronomy) sameAs Месечева_единица.
- Lunar_distance_(astronomy) sameAs LD_(astronomia).
- Lunar_distance_(astronomy) sameAs Distância_lunar.
- Lunar_distance_(astronomy) sameAs m.03m_vg.
- Lunar_distance_(astronomy) sameAs Q94921.
- Lunar_distance_(astronomy) sameAs Q94921.
- Lunar_distance_(astronomy) sameAs 月球距離.
- Lunar_distance_(astronomy) wasDerivedFrom Lunar_distance_(astronomy)?oldid=676520945.
- Lunar_distance_(astronomy) depiction Lunar_perigee_apogee.png.
- Lunar_distance_(astronomy) isPrimaryTopicOf Lunar_distance_(astronomy).