In the case of a planet, the hole is carved out by an asteroid or comet impact.
对于行星，这个洞就是由小行星或彗星碰撞打开的。
Since the era of industrialization, Fenner said, humans have had an effect on the planet rivaling any ice age or comet impact.
Fenner说，自从工业化时代以来，人类活动对地球产生作用，其影响堪比冰河时代或彗星的破坏作用。
The Chesapeake Bay region of southeastern Virginia is the site of an asteroid or comet impact that occurred during the Eocene.
维吉尼亚州东南部Chesapeake海湾地区是曾经在始新世被一颗小行星或彗星撞击的地点。
And when an asteroid takes a nosedive into a gas giant's atmosphere, it leaves different thermal and chemical fingerprints to a comet impact.
当一颗小行星进入一个气体天体的大气层时，会留下不同的热度和化学影响。
An asteroid impact is famously responsible for the extinction of the dinosaurs 65 million years ago, but large comet impacts may be equally deadly.
众所周知，6千5百万年前一颗小行星的撞击导致了恐龙的灭绝，然而一颗大彗星的撞击可能是同样致命的。
The LCROSS spacecraft, which slammed into a perpetually shaded lunar crater last fall, turned up evidence of water ice on the surface, but that ice was presumably deposited by an ancient comet impact.
去年秋季，LCROSS太空船撞击到一个永远处于阴影中的陨石坑中，发现了表层中拥有水冰的迹象，但是那些水冰可能是由于古代的彗星撞击而积存下来的。
Until the 2009 collision, the last known impact event on Jupiter was the famous "death" of Comet Shoemaker-Levy 9 in 1994.
2009年的碰撞之前，上一次已知的碰撞木星事件是著名的1994年苏梅克·列维9号彗星的死亡碰撞。
Scientists used the mothership of NASA's recycled Deep Impact comet probe to look at light reflected off Earth, the moon and Mars.
科学家们利用美国宇航局可回收的“深度撞击”彗星探测器的母船，来观测地球、月球和火星的反射光。
Deep Impact also found evidence of ice on the surface of the comet, not just inside it.
深度撞击项目组还发现了证据表明冰不仅仅存在于彗星内部，也存在于彗星表面。
In 2005, a NASA science mission called Deep Impact crashed an 816-pound copper mass into a comet to learn more about its icy interior.
2005年，美国宇航局的一项叫做深度撞击的科学任务，是用一块816磅重的铜质物体撞击一颗彗星，以了解其内部更冰冷的物质。
NASA got some nice pics in their inbox today from the Deep Impact craft, which snapped photos of a comet's core as the craft hurtled past comet Hartley 2.
美国航空航天局今天在他们的收件箱里收到了来自深度撞击号飞船的一些漂亮的照片，当彗星哈特利2号经过飞船时，飞船工作人员拍下了彗星的照片。
Three spacecraft — India's Chandrayaan-1 lunar orbiter, NASA's Saturn-bound Cassini probe, and the agency's Deep Impact comet mission — all detected evidence of water molecules on the moon's surface.
三个太空飞行器——印度的Chandrayaan - 1月球轨道器、nasa飞向土星的Cassini探测器和该机构“深度撞击”彗星任务，都探测到了月球表面存在水分子的证据。
This technology was used on July 4, 2005, when Deep Impact smashed into the comet Tempel 1.
这个技术在2005年7月4号已经运用过了，就是深度撞击坦普尔一号彗星。
Deep impact first visited comet Tempel 1 in 2005, crashing an impactor into the comet to help scan its composition from afar.
“深度冲撞”号于2005年第一次造访了彗星Tempel1，为了分析该彗星的构成，它抛出了一个冲撞器。
Hubble has trained its new camera on the atmospheric disturbance on Jupiter believed to have been caused by a comet or asteroid impact.
哈勃望远镜新装的摄像头观测到木星表面大气扰动，据估计可能受是彗星或者小行星影响。
One mission, called Deep Impact, will probe the interior of a comet by shooting a 770-pound (350-kilogram) copper bullet through its heart.
一项称之为“深度影响”的任务是通过将一个770磅(350公斤)的铜弹射人慧星的心脏来探测慧星内部的结构。
One mission, called Deep Impact, will probe the interior of a comet by shooting a 770-pound (350-kilogram) copper bullet through its heart.
一项称之为“深度影响”的任务是通过将一个770磅(350公斤)的铜弹射人慧星的心脏来探测慧星内部的结构。
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