Now might be the time to wipe the dust off that pair of binoculars and extract the family telescope from the back of the closet: Saturn is about to put on its best and brightest show, looking spiffier than at any time during the year – a performance that will be followed a few weeks later by Jupiter. The ringed planet will be at opposition on Sunday for people in North America. What exactly does that mean? Imagine Earth and Saturn are hands on a clock face, says Phil Plait, an astronomer and longtime science educator. "So very roughly once...