However, look carefully—probably with binoculars—and you may see an occasional visitor to those “Three Kings.” A “Christmas Star?” It’s Comet Leonard, which appears to be ...

This week’s first small-telescope target is Sirius ... 3.3 Propus (Eta [η] Geminorum). This nebula is a roughly circular object with an indentation on its western side, and it lies in a rich ...