Here is a trivia question: How many planets are visible without a telescope? Most will answer "five" (Mercury, Venus, Mars, Jupiter and Saturn). Some might answer "six" and include the Earth in the mix. Six, in fact, is the correct number, but if you exclude our own world, there is indeed one other planet that can be spied without optical aid: the planet Uranus. This week will be a fine time to try and seek it out, especially since it is now favorably placed for viewing in our evening sky and the waxing moon is not overly bright. Of course,...