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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 Earth to the Moon is 384,400 km (238,900 mi). (about 389 LD is 1 AU, the Earth-Sun distance) 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). High-precision measurements of the lunar distance are made by measuring the time taken for light to travel between LIDAR stations on Earth and retroreflectors placed on the Moon.The Moon is spiraling away from 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 varied in the Earth 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. 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) wikiPageRevisionID "600454440".
- Lunar_distance_(astronomy) hasPhotoCollection Lunar_distance_(astronomy).
- 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) comment "In astronomy, a lunar distance (LD) is a measurement of the distance from the Earth to the Moon. The average distance from Earth to the Moon is 384,400 km (238,900 mi). (about 389 LD is 1 AU, the Earth-Sun distance) 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).".
- Lunar_distance_(astronomy) label "Distance lunaire".
- Lunar_distance_(astronomy) label "Distancia a la luna".
- Lunar_distance_(astronomy) label "Distanza lunare".
- Lunar_distance_(astronomy) label "Distância lunar".
- Lunar_distance_(astronomy) label "LD (astronomia)".
- Lunar_distance_(astronomy) label "Lunar Distance".
- Lunar_distance_(astronomy) label "Lunar distance (astronomy)".
- Lunar_distance_(astronomy) label "地球と月の距離".
- Lunar_distance_(astronomy) label "月球距離".
- Lunar_distance_(astronomy) sameAs Lunar_Distance.
- Lunar_distance_(astronomy) sameAs Distancia_a_la_luna.
- 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 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) wasDerivedFrom Lunar_distance_(astronomy)?oldid=600454440.
- Lunar_distance_(astronomy) depiction Lunar_perigee_apogee.png.
- Lunar_distance_(astronomy) isPrimaryTopicOf Lunar_distance_(astronomy).