When it comes to the mighty Jupiter - and seeing Jupiter's moons through a small telescope or binoculars - timing is everything. Jupiter's satellites are constantly on the move, and almost any time you observe you'll see at least one. The four largest of Jupiter's moons are known as the Galileans, and go by the names of Europa, Callisto, Ganymede and Io. But which one is which and how do you know what you're looking at?

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I was just reading a random website about Battlestar Galactica, and I saw a picture on it of Colonel Saul Tigh. It suddenly occurred to me how much he looks like John McCain. I was all ready to make a funny photoshop of it, but I should’ve realized there are no original ideas on the [...]