From the article: "..and we can also use it at Mars to view other planets."

How about: "We can also use it from Mars orbit to view other planets".

I seem to recall seeing some pictures of Jupiter taken from HiRISE. Mars is a little closer to Jupiter than we are so it gets a better view, all things being equal.

Sky and Telescope did a recent feature on night time astronomy from Spirit and Opportunity. The caught some possible meteors.

You can't just throw a paper airplane out the window...you've got to shed a whole bunch of velocity (or alter the perigee of the orbit) or else it just goes round and round. I wonder how they plan to do that.