这颗彗星的轨道与地球的轨道交叉。The orbit of this comet intersects the orbit of the Earth.地球穿过某些彗星的轨迹线.The earth crosses the tracks of certain comets.今晚是看彗星的最后机会了.Tonight is the last chance to see the comet....

“彗星的”的英语可以翻译为：cometary，cometic ...