穿过猎户座的象限仪座流星雨
2020 January 20 Quadrantid Meteors through Orion Image Credit & Copyright: Petr Horálek Explanation: Why are these meteor trails nearly parallel? Because they were all shed by the same space rock and so can be traced back to the same direction on the sky: the radiant of the Quadrantid Meteor Shower. This direction used to be toward the old constellation ...