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The Luna programme
The Luna programme ("Luna" meaning "Moon"), occasionally called Lunik or Lunnik, was a series of robotic spacecraft missions sent to the Moon by the Soviet Union between 1959 and 1976. Fifteen were successful, each designed as either an orbiter or lander, and accomplished many firsts in space exploration. They also performed many experiments, studying the Moon´s chemical composition, gravity, temperature, and radiation. Twenty-four spacecraft were formally given the Luna designation, although more were launched. Those that failed to reach orbit were not publicly acknowledged at the time, and not assigned a Luna number. Those that failed in low Earth orbit were usually given Cosmos designations. The estimated cost of Luna Program was about $4.5 billion.
Luna 1 missed its intended impact with the Moon and became the first spacecraft to fall into orbit around the Sun.
In 1959, the Luna 2 mission successfully impacted upon the lunar surface, becoming the first man-made object to reach the Moon.
Luna 3 rounded the Moon later that year, and returned the first photographs of its far side, which can never be seen from Earth.
Luna 9 became the first probe to achieve a soft landing on another planetary body (February 1966). It returned five black and white stereoscopic circular panoramas, which were the first close-up shots of the Lunar surface.
Later that year Luna 10 became the first artificial satellite of the Moon.
Luna 17 and Luna 21 carried vehicles that roamed around on the Moon´s terrain (see Lunokhod programme).
Another major achievement of the Luna programme, with the Luna 16, Luna 20 and Luna 24 spacecraft, was the ability to collect samples of lunar soil and return them to Earth, by 1970. The program returned 0.326 kg of lunar samples. The Luna missions were the first space-exploration sample return missions to rely solely on advanced robotics.
Luna 17
Luna 17 (Ye-8 series) was an unmanned space mission of the Luna program, also called Lunik 17.
Luna 17 was launched from an Earth parking orbit towards the Moon and entered lunar orbit on 15 November 1970. The spacecraft softly landed on the Moon in the Sea of Rains. The spacecraft had dual ramps by which the payload, Lunokhod 1, descended to the lunar surface. Lunokhod 1 was a lunar vehicle formed of a tub-like compartment with a large convex lid on eight independently powered wheels. Lunokhod was equipped with a cone-shaped antenna, a highly directional helical antenna, four television cameras, and special extendable devices to impact the lunar soil for soil density and mechanical property tests. An x-ray spectrometer, an x-ray telescope, cosmic-ray detectors, and a laser device were also included. The vehicle was powered by a solar cell array mounted on the underside of the lid. Lunokhod was intended to operate through three lunar days but actually operated for eleven lunar days. The operations of Lunokhod officially ceased on 4 October 1971, the anniversary of Sputnik 1, after having travelled over 10.5 kilometers while taking pictures and performing numerous tests.
Luna 17 continued the spate of successes in Soviet lunar exploration begun by Luna 16 and Zond 8. Luna 17 carried Lunokhod 1, the first in a series of robot lunar roving vehicles whose conception had begun in the early 1960s, originally as part of the piloted lunar landing operations. This was the second attempt to land such a vehicle on the Moon after a failure in February 1969. The descent stage was equipped with two landing ramps for the “ascent stage,” that is, the rover, to disembark onto the Moon’s surface. The 756-kilogram rover stood about 1.35 meters high and was 2.15 meters across. Each of its eight wheels could be controlled independently for two forward and two reverse speeds. Its top speed was about 100 meters per hour, with commands issued by a five-man team of “drivers” on Earth who had to deal with the 5- second delay. The set of scientific instruments was powered by solar cells (installed on the inside of the hinged top lid of the rover) and chemical batteries. After two midcourse corrections en route to the Moon, Luna 17 entered lunar orbit and then landed on the lunar surface at 03:46:50 UT on 17 November 1970 at 38°17´ north latitude and 35° west longitude, about 2,500 kilometers from the Luna 16 site in the Sea of Rains. The Lunokhod 1 rover rolled over the ramps and onto the lunar surface at 06:28 UT. The rover had an expected lifetime of three lunar days but operated for eleven. During its 322 Earth days of operation, the rover traveled 10.54 kilometers and returned more than 20,000 TV images and 206 high-resolution panoramas. In addition, Lunokhod 1 performed twenty-five soil analyses with its RIFMA x-ray fluorescence spectrometer and used its penetrometer at 500 different locations. Controllers finished the last communications session with Lunokhod 1 at 13:05 UT on 14 September 1971. Attempts to reestablish contact were finally discontinued on 4 October.
In March 2010, the Lunar Reconnaissance Orbiter photographed the landing site of Luna 17, showing the lander and tracks of the rover. In April 2010, the Apache Point Observatory Lunar Laser-ranging Operation team announced that with the aid of these photos, they had found the long lost Lunakhod 1 rover and had received returns from the laser retroreflector.
Launch Date/Time: 1970-11-10 at 14:44:01 UTC
On-orbit dry mass: 5600 kg
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