远古的天体碰撞可能诠释月球表面的双面特性。
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.
在这种碰撞中，撞击者被完全摧毁，其物质被并入较大的天体中。
In such collisions, the impactor is completely destroyed and its material is incorporated into the larger body.
在图中央偏左处的明亮扭曲天体实际上是两个相互碰撞的矮星系。
The bright, distorted object at middle, left, is actually two colliding dwarf galaxies.
4亿年前，一个火星大小的天体和地球发生了灾难性的碰撞从而产生了月亮。
It was created by a catastrophic collision between our planet and a Mars-size body over 4 billion years ago.
研究人员推测数这些碎块经过数十亿年的互相碰撞，柯伊伯型天体磨得更碎，柯伊伯带原始状态不再。
Researchers surmise that over billions of years the debris should collide, grinding the KBO-type objects down to ever smaller pieces that were not part of the original Kuiper Belt population.
也没办法避免……双月碰撞属于低速碰撞，”圣克鲁兹州加利福尼亚大学天体科学家兼本次研究论文撰写者埃里克·埃斯帕格说。
This big splat is a low-velocity collision, " said study co-author Erik Asphaug, a planetary scientist at the University of California, Santa Cruz.
也没办法避免……双月碰撞属于低速碰撞，”圣克鲁兹州加利福尼亚大学天体科学家兼本次研究论文撰写者埃里克·埃斯帕格说。
This big splat is a low-velocity collision," said study co-author Erik Asphaug, a planetary scientist at the University of California, Santa Cruz.
嗯，宇宙是个混沌之地。 某一星系，或一组星系的万有引力可能会影响其周围天体的活动，使得它们发生碰撞。
Well, the universe is a chaotic place-and the gravity from one galaxy, or from a group of galaxies, may disturb the motion of its near neighbors, causing them to collide.
负离子与原子碰撞的单电子脱附过程是普遍存在于等离子体物理、天体物理、电离层物理学中的重要过程。
The single electron detachment of negative ions in collision with atoms is known to be one of the most fundamental processes occurring in plasma physics, astrophysics, and ionospheric physics.
负离子与原子碰撞的单电子脱附过程是普遍存在于等离子体物理、天体物理、电离层物理学中的重要过程。
The single electron detachment of negative ions in collision with atoms is known to be one of the most fundamental processes occurring in plasma physics, astrophysics, and ionospheric physics.
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