Tonight, Jupiter and Mars will be making an extremely close pass in the Eastern predawn sky. How close? A quarter angular degree of separation, which can be a good test for one's vision without optical aid. To see the show, simply head out in t he predawn sky and look East for the second brightest (Venus is the brightest) object in that area of sky to find Jupiter. That much dimmer 'star' next to the planetary king? That's Mars, the Red Planet. For some fun, turn a telescope on the pair at low power (30x or less) in order to really bring out the color difference.