Mission type | Planetary Science | ||||||||||||||||||||||
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Operator | Soviet space program | ||||||||||||||||||||||
COSPAR ID | 1973-001A | ||||||||||||||||||||||
SATCAT no. | 6333 | ||||||||||||||||||||||
Mission duration | 8 days (day of launch to day of landing) | ||||||||||||||||||||||
Spacecraft properties | |||||||||||||||||||||||
Manufacturer | GSMZ Lavochkin | ||||||||||||||||||||||
Launch mass | 5,700 kg (12,600 lb) [1] | ||||||||||||||||||||||
Dry mass | 4,850 kg (10,690 lb) | ||||||||||||||||||||||
Start of mission | |||||||||||||||||||||||
Launch date | 06:55:38,8 January 1973(UTC) [1] | ||||||||||||||||||||||
Rocket | Proton 8K82K with Blok D upper stage | ||||||||||||||||||||||
Launch site | Baikonur Cosmodrome | ||||||||||||||||||||||
Moon orbiter | |||||||||||||||||||||||
Orbital insertion | 12 January 1973 | ||||||||||||||||||||||
Orbits | ~36 | ||||||||||||||||||||||
Orbital parameters | |||||||||||||||||||||||
Periselene altitude | 90 km (56 mi) | ||||||||||||||||||||||
Aposelene altitude | 100 km (62 mi) | ||||||||||||||||||||||
Inclination | 60° | ||||||||||||||||||||||
Moon lander | |||||||||||||||||||||||
Landing date | 22:35,15 January 1973 | ||||||||||||||||||||||
Landing site | 25°51′N30°27′E / 25.85°N 30.45°E [2] | ||||||||||||||||||||||
Moon rover | |||||||||||||||||||||||
Spacecraft component | Lunokhod 2 | ||||||||||||||||||||||
Landing date | 01:14,16 January 1973 | ||||||||||||||||||||||
Distance driven | 42 km (26 mi) | ||||||||||||||||||||||
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Luna 21 (Ye-8 series) was an uncrewed space mission,and its spacecraft,of the Luna program,also called Lunik 21,in 1973. The spacecraft landed on the Moon and deployed the second Soviet lunar rover, Lunokhod 2 . The primary objectives of the mission were to collect images of the lunar surface,examine ambient light levels to determine the feasibility of astronomical observations from the Moon,perform laser ranging experiments from Earth,observe solar X-rays,measure local magnetic fields,and study mechanical properties of the lunar surface material.
Luna 21 carried the second successful Soviet lunar rover,Lunokhod 2,and was launched less than a month after the last Apollo lunar landing. The Proton-K/D launcher put the spacecraft into Earth parking orbit followed by translunar injection. On 12 January 1973,Luna 21 was braked into a 90 ×100 km orbit about the Moon,at a 60°inclination. On 13 and 14 January,the perilune was lowered to 16 km altitude. On 15 January after 40 orbits,the braking rocket was fired at 16 km altitude,and the craft went into free fall. At an altitude of 750 meters the main thrusters began firing,slowing the fall until a height of 22 meters was reached. At this point the main thrusters shut down and the secondary thrusters ignited,slowing the fall until the lander was 1.5 meters above the surface,where the engine was cut off. Landing occurred at 23:35 UT in Le Monnier crater at 25.85°N,30.45°E,between Mare Serenitatis ("Sea of Serenity") and the Taurus Mountains. The lander carried a bas-relief of Vladimir Lenin and the Soviet coat-of-arms.
Less than three hours later,at 01:14 UT on 16 January,the rover disembarked onto the lunar surface. The 840 kilogram Lunokhod 2 was an improved version of its predecessor and was equipped with a third TV camera,an improved eight-wheel traction system,and additional scientific instrumentation. By the end of its first lunar day,Lunokhod 2 had already traveled further than Lunokhod 1 in its entire operational life. On 9 May,the rover inadvertently rolled into a crater and dust covered its solar panels and radiators,disrupting temperatures in the vehicle. Attempts to save the rover failed,and on 3 June,the Soviet news agency announced that its mission was over. Before last contact,the rover took 80,000 TV pictures and 86 panoramic photos and had performed hundreds of mechanical and chemical surveys of the soil. The Soviets later revealed that during a conference on planetary exploration in Moscow,29 January to 2 February 1973 (that is,after the landing of Luna 21),an American scientist had given photos of the lunar surface around the Luna 21 landing site to a Soviet engineer in charge of the Lunokhod 2 mission. These photos,taken prior to the Apollo 17 landing,were later used by the "driver team" to navigate the new rover on its mission on the Moon
Luna 21 and Lunokhod 2 ,still on the Moon,were purchased by Richard Garriott in December 1993 at a Sotheby's auction in New York.
Space technology is technology for use in outer space. Space technology Includes space vehicles such as spacecraft, satellites, space stations and orbital launch vehicles; deep-space communication; in-space propulsion; and a wide variety of other technologies including support infrastructure equipment, and procedures.
Lunokhod was a series of Soviet robotic lunar rovers designed to land on the Moon between 1969 and 1977. Lunokhod 1 was the first roving remote-controlled robot to land on an extraterrestrial body.
Lunokhod 1, also known as Аппарат 8ЕЛ № 203 was the first robotic rover on the Moon and the first to freely move across the surface of an astronomical object beyond the Earth. Sent by the Soviet Union it was part of the robotic rovers Lunokhod program. The Luna 17 spacecraft carried Lunokhod 1 to the Moon in 1970. Lunokhod 0 (No.201), the previous and first attempt to land a rover, launched in February 1969 but failed to reach Earth orbit.
Lunokhod 2 was the second of two uncrewed lunar rovers that landed on the Moon by the Soviet Union as part of the Lunokhod programme.
The Luna programme, occasionally called Lunik by western media, was a series of robotic spacecraft missions sent to the Moon by the Soviet Union between 1959 and 1976. The programme accomplished many firsts in space exploration, including first flyby of the Moon, first impact of the Moon and first photos of the far side of the Moon. Each mission was designed as either an orbiter or lander. They also performed many experiments, studying the Moon's chemical composition, gravity, temperature, and radiation.
Luna 11 was an uncrewed space mission of the Soviet Union's Luna program. It was also called Lunik 11. Luna 11 was launched towards the Moon onboard a Molniya-M and entered lunar orbit on 27 August 1966.
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Luna 16 was an uncrewed 1970 space mission, part of the Soviet Luna program. It was the first robotic probe to land on the Moon and return a sample of lunar soil to Earth. The 101 grams sample was returned from Mare Fecunditatis. It represented the first successful lunar sample return mission by the Soviet Union and was the third lunar sample return mission overall.
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A Moon landing or lunar landing is the arrival of a spacecraft on the surface of the Moon, including both crewed and robotic missions. The first human-made object to touch the Moon was Luna 2 in 1959.
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The physical exploration of the Moon began when Luna 2, a space probe launched by the Soviet Union, made a deliberate impact on the surface of the Moon on September 14, 1959. Prior to that the only available means of exploration had been observation from Earth. The invention of the optical telescope brought about the first leap in the quality of lunar observations. Galileo Galilei is generally credited as the first person to use a telescope for astronomical purposes; having made his own telescope in 1609, the mountains and craters on the lunar surface were among his first observations using it.
A rover is a planetary surface exploration device designed to move over the rough surface of a planet or other planetary mass celestial bodies. Some rovers have been designed as land vehicles to transport members of a human spaceflight crew; others have been partially or fully autonomous robots. Rovers are typically created to land on another planet via a lander-style spacecraft, tasked to collect information about the terrain, and to take crust samples such as dust, soil, rocks, and even liquids. They are essential tools in space exploration.
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