HOLE-Y COW   What did you do over your winter vacation? If you were the Opportunity rover on Mars, you spent four months of it stationary and perched on the northern slope of Greeley Haven — and tilted so that your solar panels could absorb as much sunlight as possible. During its winter stopover, the usually rolling robotundertook several science activities including snapping over 800 images of its surroundings, many of which have been combined into this 360-degree digitally-compressed panorama and shown in exaggerated colors to highlight different surface features. Past tracks of Opportunity can be seen toward the left, while Opportunity’s dust covered solar panels cross the image bottom.  Or maybe they’re from Daleks, were not really sure.  (Photo via NASA APOD)