Thanks, Greg...and as for the circle-tracks, which always reminds me of the 'doughnuts' that some bikers do here on our earth roads, this YouTube vid of the rover moving across the surface explains it all (the rover has six wheels, and in the vid you can see how the outer corner set of four wheels produces the 'doughnuts' by turning individually on each of their vertical axes). Note, the vid appears to hang for a second or two at some points, but this was due to pre-cautionary stops for its next movement.
And who can blame anyone for these stops, as the engineers wouldn't like to get stuck in something like the small impact feature shown below at left (the right image shows the impact feature in the red circle). Btw, the discolouration in this right-most image is due to reflection effects in to one of Yutu2's cameras - apparently, light reflections off the rover's body set off alarms as it moved across the surface during its autonomously/avoidance drive. The green line shows the rover's path (think, moving from right to left as viewed) - the red mark at left in the right-most image being the location where Yutu2 took the image of the impact feature.
click for larger view (Credit: CLEP)
Edited by Jayem, 16 May 2019 - 07:00 PM.