在每个轨道内，天体之间的碰撞产生了巨大的热量和能量。
Within each orbit, collisions between planetesimals generated immense heat and energy.
太阳是我们已知的太阳系内最大的天体，占有太阳系总质量的99.8％。
The sun is by far the largest object in our solar system, containing 99.8 percent of the solar system's mass.
据估计，奥尔特云的边界应在50,000天文单位外，因此该天体依然位于奥尔特云内。
This is still well within the Oort cloud, whose boundary is estimated to be beyond 50,000 AU.
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