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1·Most moons are either round and smooth, or lumpy pieces of space rock.

大多数卫星要么是圆形的，要么是光滑的，要么是块状的太空岩石。

2·Space Rock, Neo-Psychedelia, Alternative.

太空摇滚，新迷幻，另类。

3·Can you imagine what would happen if Earth collided with a huge space rock?

你能够想像地球如果撞上太空中的一颗巨大石块会怎么样吗？

4·It is a space rock captured and now held in orbit by the gravity force of Mars.

它只是星际空间的一块岩体，受火星引力作用而被吸引住，并沿着轨道环绕火星运动。

5·Near-Earth asteroid - space rock damaged buildings and crashed into Russian lake.

近地小行星——空间岩石毁坏建筑并撞入俄罗斯湖里。

6·Of course, a lot can happen to an errant space rock in 172 years, hence the odds of one-in-a-thousand.

的确，在今后172年中，这种在太空中漫游的巨石的去向有各种可能，其撞击地球的概率为千分之一。

7·He was sure he had captured a fireball as a piece of space rock struck the moon with great energy.

他很肯定，当某块星际岩石猛裂撞击月球表面时，他抓拍到了撞击产生的火球。

8·With proper research and financing, he noted, it should be possible to divert a space rock and avoid disaster.

他提出，通过适当的研究和适度的财政投入，应该有可能使太空岩石转向，避免灾难的发生。

9·The space rock, estimated to be about 400 meters across, coasted by just inside the orbit of Earth's Moon.

这块太空石头的大小估计有400米，刚好自月球绕地球轨道内滑过。

10·Our planet's risk of being hit by a dangerous outer space rock may be smaller than scientists previously thought.

我们这颗星球被太空小行星(陨石)击中的危险可能比科学家以前估计的更小一些。