陨石坑

The researchers estimate that there also was about a 70% probability that the prominent Tycho crater on the moon, formed 108 million years ago and measuring about 85 kilometres across, was also carved out by a remnant of the earlier asteroid collision.

研究人员估计，月球上著名的第谷陨石坑形成于1.08亿年前，直径约85公里，也是那次较早小行星碰撞造成的。这种可能性为约70%。

Extensive volcanism at that time wiped out the earlier surface including any large craters from early in Venus' history.

广泛的火山活动在时间上抹去了早些时候的表面包括任何大型陨石坑从年初在金星的历史。

Comparing this whippersnapper to older craters can therefore help researchers figure out how fast wind action changes the red planet's surface.

通过比较这个新生的和那些古老的陨石坑，可以帮助研究者们解决火星表面的风蚀速度的问题。

Identifiable craters seen on the moon include Saha, Wyld and Saenger.

在照片中可以看到月球上的三座陨石坑——Saha、 Wyld和Saenger。

In Mexico's Yucatan peninsula have called the Chicxulub crater, and its 6,500 years ago What is the relationship between the extinction of dinosaurs?

在墨西哥的尤卡坦半岛上有一个叫做希克苏鲁伯的陨石坑，它和6500万年前的恐龙灭绝有什么关系？

The Caloris Basin is a notable landmark, a giant crater having a 650 km radius and is similar to the lunar basins.

该Caloris盆地是一个重要里程碑，一个巨大的陨石坑有一个650公里的半径，它类似于月球盆地。

The impact craters from that era have been smoothed out. As it froze and expanded, the surface must have cracked to accommodate the extra volume producing Ithaca Chasma.

历史上由碰撞产生的陨石坑已经平滑了，随着它的凝固和膨胀，它的表面可能裂开而产生额外的容量，这样便产生了Ithaca Chasma。

Hypotheses for the formation of Ithaca Chasma include cracking of Tethy's outer crust as the moon cooled long ago, and that somehow the rift is related to the huge Great Basin impact crater named Odysseus, visible elsewhere on the unusual moon.

关于Ithaca Chasma如何形成的假说包括在很久以前土卫三慢慢变冷的过程中，其外表地壳裂开，以及那条裂缝可能与在别处一个叫奥德修斯的巨大陨石坑有关。

Mars has obviously had an active geological history as can be seen from its cratered surface.

很显然，历史上火星的地理结构是非常活跃的，这一点从它布满陨石坑的表面可以看出来。

Other notable features visible above include vast plains of craterless icy grooves , the day-night terminator across the image left, and an area near the top comparatively rich in craters.

其他显着特点是图像左边遍布大片平整的冰槽，这种现象日夜分明交替，以及大量陨石坑遍布的区域。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。