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How Lunokhod-1 was found

25.04.2010

"Lunokhod-1" lost many years ago on the surface of the Moon has finally been found!

Lunokhod 1 disappeared from radar screens on September 14, 1971, almost a year after it was delivered to the Moon. And this greatly upset the scientists: a French reflector was installed on it, with the help of which, by reflecting a laser beam, physicists hope to measure the distance to the Moon with an accuracy of a millimeter (such accuracy is needed to search for deviations from Einstein's theory of relativity).

Since then, four reflectors have remained at their disposal - three were brought by Apollos -11, 14 and 15, and the fourth is on Lunokhod-2. This last one is badly oriented, so it is difficult to use it. And to achieve the required accuracy, five reflectors are required: three for determining the coordinates, one for accounting for tidal forces, and one more for control. And in April 2010, the American satellite "Lunar Reconnaissance Orbiter" examined a luminous spot on the surface of the Moon a few kilometers from the place where everyone was looking for "Lunokhod-1".

On April 22, scientists from the group of Tom Murphy, a professor at the University of California at San Diego, aimed a laser at the speck and received a return signal. A repeated experiment, carried out 30 minutes later, made it possible to calculate the coordinates of Lunokhod-1 with an accuracy of ten meters. Now he's back in action.

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