Looking for a sky event this week? Check out our full Sky This Week column.  January 7: Europa transits Jupiter January 8 opens with the icy moon Europa and its shadow transiting the disk of Jupiter. The two move across the disk from east to west until the shadow disappears from the eastern limb by 2:30 A.M. EST Continue reading "The Sky Today on Thursday, January 8: Zoom in on the Perseus Cluster" The post The Sky Today on Thursday, January 8: Zoom in on the Perseus Cluster appeared first on Astronomy Magazine .