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由浮动堆剩余物中游走出颗星。它体积微小，以倾斜、细长轨道围太阳运转。

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第炮，而在今天美国东部时间早上6点，在发射了78天后它成功跨越了火星轨道。