Mars will soon be closer to the Earth than it has been since the days of Neanderthal man. You’ll be reading a lot about that as the excitement builds. Today I’ll tell you how to use your computer to learn more about Mars and also give you advice that may help you and your family take advantage of this once-in-a-thousand-lifetimes opportunity. By August 2003, Mars will be six times brighter in the night sky than you’ve ever seen it. Along with this column is a list of Web sites that offer some special resources that deal with viewing Mars.