Spirit, the less healthy of the two Mars Rovers, spent the last southern Martian winter hunkered down on a small hill, its solar panels aimed square at the dwindling sunlight. It wasn't just sitting on its arse and doing nothing, though: it was compiling the most detailed panorama of Mars so far.
This panorama has finally been released, to mark Spirit's 1000th Martian day on the red planet. It was expected to last for 90 Martian days.
Follow these links to read about the story in more detail and find higher resolution images. The biggest image is about 90Mb in size. O_O