"NASA's Spirit Mars rover today passes its sixth anniversary on the Red Planet, albeit bogged down in sandy soil which looks likely to be its final resting place."
"Unless Spirit can angle its solar arrays to capture the maximum possible sunlight, it faces the prospect of freezing to death when winter arrives in five months, since it won't be able to power the internal heaters which protect its electronics. NASA explains that the current tilt is "nearly five degrees toward the south", which is "unfavorable because the winter sun crosses low in the northern sky"."
http://www.theregister.co.uk/2010/01...r_anniversary/
