Fast Facts: Unnamed Moon Mission (Ye-6 No. 6)

This Soviet lunar lander fell back to Earth minutes after launch.

The mission was not acknowledged at the time by the Soviet Union. Historians have identified it as part of the Soviet Luna series of Moon missions.


This fourth Soviet attempt to achieve a soft-landing on the Moon ended in failure when the spacecraft failed to reach an intermediate orbit around Earth.

During the boost phase, the launcher’s third stage engine’s (8D715) main liquid oxygen valve failed to open when the valve rod broke. As a result, the Ye-engine never achieved full thrust and eventually cut off prematurely at T+487 seconds. The spacecraft never reached Earth orbit.

Stitched together view of Martian surface.
This 360-degree panorama is composed of 354 images taken by the Opportunity rover's Panoramic Camera (Pancam) from May 13 through June 10, 2018, or sols (Martian days) 5,084 through 5,111. This is the last panorama Opportunity acquired before the solar-powered rover succumbed to a global Martian dust storm on the same June 10. The view is presented in false color to make some differences between materials easier to see. Credit: NASA/JPL-Caltech/Cornell/ASU

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