。自1623年以来，两颗行星看上去从来没有那么近。
397年的爱情
长跑，有情“星球”终于再次相聚
。Canada Space Agency:
What do you get when you cross two gas giants? A cosmic kiss!
Jupiter and Saturn will meet in the southwestern sky after sunset on December 21. The two planets haven’t appeared to be this close since 1623.
Photo: Pete Lawrence