Chang’e-4 and Yutu-2 awake for 7th lunar day


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The new colonial movement: Chinese engineers have awakened both the Chang’e-4 lander and the Yutu-2 rover to begin work on their seventh lunar day on the Moon’s far side.

The text of this Chinese news report is almost identical to the text in the news report a month ago, when both spacecraft were awakened for the sixth lunar day. And as before, it tells us little.

What today’s story reveals is that Yutu-2 traveled only about 75 feet during the sixth lunar day. With an overall odometer reading of 695 feet, it appears it is averaging about 100 feet per lunar day, with the per day number dropping with time. Either the science team is becoming cautious, or they have had unstated issues that have slowed them down.

Still, the rover’s nominal mission was only three lunar days, so it is survived more than twice as long as designed.

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