solar system

1.It is a tiny joyrider from the rubble stream surrounding the solar system that broke free and orbits the sun in a tilted, elongated orbit.

它是从围绕太阳系而又自的一堆剩余物中游走出来的一颗星。它体积微小，以倾斜、细长的轨道围太阳运转。

2.New Horizons' trailblazing journey to the solar system's outermost frontier took it past the orbit of Mars today at 6 a.m. EDT , 78 days after the spacecraft launched.

新地平线打响了探索太阳系边疆的第一炮，而在今天美国东早上6点，在发射了78天后它成功跨越了火星轨道。