asteroids

简明释义

英[ˈæstəˌrɔɪdz]美[ˈæstərɔɪdz]

n. [天]小行星（asteroid 的复数）

英英释义

单词用法

同义词

反义词

例句

1.Dr Bottke has been tracking the orbits of asteroids.

伯克(Bottke)博士一直在追踪小行星的运行轨迹。

2.I'm not going to go into any depth on comets and asteroids now, but we'll come back later and do that.

我现在不打算深入讨论彗星和小行星了，但是我们稍后会再回到这个点上，讨论这方面的内容。

3.Rubin suggests that asteroids' heat could have derived from collisions between asteroids.

鲁宾认为，小行星的热量可能来自小行星之间的碰撞。

4.Skeptics have argued that a single impact would raise an asteroid's overall temperature very little and that asteroids would cool too quickly between impacts to accumulate much heat.

怀疑派认为，一次撞击只会使小行星的整体温度上升很小，而且小行星在两次撞击之间会迅速冷却，从而无法积聚大量热量。

5.Watery Asteroids Also a Source?

小行星上的水也是来源之一？

6.Asteroids may want to think twice before they swing too close to Earth.

小行星在过于飞近地球之前可能会再三考虑一下。

7.Asteroids classify comets based on the durations of their orbits around the sun.

天文学上把彗星按照它们的轨道周期分类。

8.Asteroids May Have Brought Precious Metals to earth.

小行星可能把贵金属带到地球。

9.If there were no asteroids would there be no extinctions?

如果没有小行星，就不会有灭绝了吗？

10.Astronomers use telescopes to track the movement of asteroids across the night sky.

天文学家使用望远镜跟踪夜空中小行星的运动。

11.Scientists are studying the composition of asteroids to understand the early solar system.

科学家们正在研究小行星的成分，以了解早期的太阳系。

12.Some asteroids have valuable metals that could be mined for use on Earth.

一些小行星含有可以在地球上开采的贵重金属。

13.The orbits of asteroids can sometimes bring them close to Earth, raising concerns about potential impacts.

一些小行星的轨道有时会使它们靠近地球，引发对潜在撞击的担忧。

14.NASA plans to send a mission to collect samples from asteroids in the near future.

美国宇航局计划在不久的将来派遣任务去收集小行星的样本。

作文

Asteroids, often referred to as "minor planets" or "planetoids," are small rocky bodies that orbit the Sun, primarily found in the region between the orbits of Mars and Jupiter known as the asteroid belt. These celestial objects vary significantly in size, shape, and composition. Some asteroids are just a few meters across, while others can be hundreds of kilometers wide. The study of asteroids (小行星) is crucial for understanding the formation and evolution of our solar system. Asteroids are remnants from the early solar system, leftover materials that never coalesced into planets. Their existence offers valuable insights into the conditions of the early solar system and the processes that led to the formation of the planets we know today. By examining asteroids (小行星), scientists can learn about the building blocks of the planets and the history of our cosmic neighborhood.One of the most famous asteroids (小行星) is Ceres, which is also classified as a dwarf planet. Ceres is the largest object in the asteroid belt and has a diameter of about 940 kilometers. It was discovered in 1801 and has since been the subject of numerous studies, especially after NASA's Dawn mission, which provided detailed images and data about its surface and composition. Other notable asteroids (小行星) include Vesta, Pallas, and Hygiea, each with unique characteristics and histories.The potential threat posed by asteroids (小行星) to Earth is another significant aspect of their study. Some asteroids (小行星) have orbits that bring them close to our planet, and scientists continuously monitor these near-Earth objects (NEOs) to assess any potential collision risks. Understanding the trajectory and composition of these asteroids (小行星) is vital for planetary defense strategies. For instance, if a large asteroid (小行星) were to collide with Earth, it could cause catastrophic damage, similar to the event believed to have led to the extinction of the dinosaurs 66 million years ago.In addition to their scientific significance, asteroids (小行星) also hold potential economic value. Some asteroids (小行星) are rich in metals and other resources, making them targets for future mining operations. Companies and space agencies are exploring the feasibility of extracting valuable materials from asteroids (小行星) to support space exploration and even sustain life in space. This prospect opens up new avenues for innovation and investment in space technology.In conclusion, asteroids (小行星) are not just fascinating celestial objects; they are key players in our understanding of the solar system's history, potential threats to Earth, and future economic opportunities. As technology advances, our ability to explore and study asteroids (小行星) will continue to improve, offering new discoveries and insights into the universe. The exploration of asteroids (小行星) represents a frontier of science that holds great promise for humanity's future in space.

小行星，通常被称为“次级行星”或“行星体”，是围绕太阳运行的小型岩石体，主要位于火星和木星之间的区域，即小行星带。这些天体在大小、形状和成分上有很大差异。有些小行星只有几米宽，而其他一些可能有数百公里宽。研究小行星（asteroids）对理解我们的太阳系的形成和演化至关重要。小行星是早期太阳系的遗留物，是未能聚合成行星的剩余材料。它们的存在提供了关于早期太阳系条件和导致我们今天所知的行星形成过程的宝贵见解。通过研究小行星（asteroids），科学家可以了解行星的构成部分以及我们宇宙邻域的历史。最著名的小行星（asteroids）之一是谷神星，它也被归类为矮行星。谷神星是小行星带中最大的物体，直径约为940公里。它于1801年被发现，此后成为众多研究的对象，尤其是在美国宇航局的“黎明号”任务之后，该任务提供了关于其表面和成分的详细图像和数据。其他著名的小行星（asteroids）包括维斯塔、帕拉斯和海吉亚，每个都有独特的特征和历史。小行星（asteroids）对地球可能构成的威胁是它们研究的另一个重要方面。一些小行星（asteroids）的轨道将它们带到离我们星球很近的地方，科学家们不断监测这些近地天体(NEOs)，以评估任何潜在的碰撞风险。理解这些小行星（asteroids）的轨迹和成分对于行星防御策略至关重要。例如，如果一颗大型小行星（asteroids）与地球相撞，可能会造成灾难性损害，这类似于66百万年前导致恐龙灭绝的事件。除了科学意义外，小行星（asteroids）还具有潜在的经济价值。一些小行星（asteroids）富含金属和其他资源，使其成为未来采矿作业的目标。公司和太空机构正在探索从小行星（asteroids）中提取宝贵材料的可行性，以支持太空探索，甚至在太空中维持生命。这一前景开启了太空技术创新和投资的新途径。总之，小行星（asteroids）不仅是迷人的天体；它们是我们理解太阳系历史、潜在的地球威胁和未来经济机会的关键角色。随着技术的进步，我们探索和研究小行星（asteroids）的能力将继续提高，带来新的发现和对宇宙的深入了解。对小行星（asteroids）的探索代表了科学的一个前沿，蕴含着人类未来在太空中的巨大希望。