asteroid

简明释义

英[ˈæstərɔɪd]美[ˈæstərɔɪd]

n. 小行星；海星

adj. 星状的；类似海星的

复 数 a s t e r o i d s

英英释义

单词用法

同义词

反义词

例句

1.But until now, no such asteroid-asteroid collision has been caught "in the act".

但是，直到今天，我们都没有“当场”捕捉到这种小行星对小行星的碰撞。

2.Some scientists hypothesize that the extinction of the dinosaurs resulted from the effects of an asteroid collision with Earth.

一些科学家假定，小行星撞击地球导致了恐龙的灭绝。

3.Astronomers have detected an asteroid not far from Earth, moving in the same orbit around the Sun.

天文学家在距离地球不远处发现一颗小行星，它与地球在同一轨道上围绕太阳运行。

4.The agency's plans to send humans to Mars or an asteroid are in deep freeze.

该机构将人类送上火星或小行星的计划也同样束之高阁。

5.Will an asteroid hit the Earth?

会不会发生小行星撞击地球的事件呢？

6.In this case, the orbit of the rotating asteroid will very slowly spiral toward the sun.

在这种情况下，旋转小行星的轨道将非常缓慢地向太阳旋转。

7.The asteroid was first spotted during a routine survey performed by a satellite.

这颗小行星是在一次例行检查中被一颗卫星发现的。

8.Potential destinations include an asteroid, the moon and eventually Mars.

现在以确定的潜在目的地有小行星，月球，当然最终自然是火星。

9.NASA's mission aims to study the composition of an asteroid to learn more about the solar system's formation.

美国宇航局的任务旨在研究一颗小行星的成分，以了解更多关于太阳系的形成。

10.Scientists have discovered a new asteroid that could potentially impact Earth in the next century.

科学家发现了一颗新的小行星，它可能在下个世纪对地球产生影响。

11.The chances of an asteroid hitting Earth are low, but scientists continue to monitor near-Earth objects.

一颗小行星撞击地球的几率很低，但科学家们仍然持续监测近地天体。

12.The spacecraft is designed to collect samples from the surface of an asteroid.

这艘航天器旨在从一颗小行星的表面收集样本。

13.An asteroid belt lies between Mars and Jupiter, filled with millions of rocky bodies.

在火星和木星之间有一条小行星带，里面充满了数百万个岩石体。

作文

In the vast expanse of our solar system, there are countless celestial bodies that capture our imagination and curiosity. Among these, one particularly fascinating group is the asteroid. An asteroid (小行星) is a small rocky body that orbits the Sun, primarily found in the region between Mars and Jupiter known as the asteroid belt. These remnants from the early solar system provide invaluable insights into the formation and evolution of planetary bodies.The study of asteroids is essential for several reasons. Firstly, they are considered to be the building blocks of planets. By examining their composition and structure, scientists can gain a better understanding of how planets like Earth formed billions of years ago. Many asteroids contain metals, minerals, and even organic compounds, which are crucial for studying the origins of life.Moreover, asteroids pose both opportunities and risks. On one hand, some asteroids are rich in valuable resources such as nickel, iron, and precious metals. Mining these celestial bodies could potentially provide resources for future space exploration and even for industries on Earth. Companies and space agencies are already exploring the possibility of asteroid mining, which could revolutionize our approach to resource management.On the other hand, asteroids also present a significant threat to our planet. The potential for an asteroid impact is a serious concern for scientists and astronomers. Historical events, such as the extinction of the dinosaurs, have been linked to massive impacts from asteroids. As a result, monitoring near-Earth asteroids has become a priority for space agencies worldwide. Various missions are underway to track these objects and assess their trajectories to predict any possible collisions with Earth.In recent years, significant advancements have been made in the exploration of asteroids. NASA's OSIRIS-REx mission successfully collected samples from the asteroid Bennu and is set to return them to Earth in 2023. This groundbreaking mission aims to analyze the samples to learn more about the early solar system and the materials that contributed to the formation of planets.Furthermore, Japan's Hayabusa2 mission has also returned samples from the asteroid Ryugu, providing further insights into the composition of these ancient celestial bodies. These missions highlight the growing interest in asteroids and their potential to unlock secrets about our universe.In conclusion, asteroids are not merely rocks floating in space; they are crucial pieces of the puzzle that help us understand the history and future of our solar system. Whether through the potential for resource extraction or the need for planetary defense, the study of asteroids remains a vital area of research. As we continue to explore and learn about these intriguing celestial bodies, we may uncover new possibilities that could shape the future of humanity in space. The fascination with asteroids will undoubtedly endure as we strive to understand our place in the cosmos.

在我们太阳系的广阔空间中，有无数天体吸引着我们的想象力和好奇心。其中，一个特别迷人的群体就是小行星。小行星（asteroid）是围绕太阳运行的小型岩石体，主要位于火星和木星之间被称为小行星带的区域。这些来自早期太阳系的残余物为我们提供了关于行星物体形成和演化的宝贵见解。对小行星的研究至关重要，原因有几个。首先，它们被认为是行星的构建块。通过检查它们的成分和结构，科学家可以更好地理解像地球这样的行星是如何在数十亿年前形成的。许多小行星含有金属、矿物，甚至有机化合物，这对于研究生命的起源至关重要。此外，小行星既带来了机会，也带来了风险。一方面，一些小行星富含如镍、铁和贵金属等宝贵资源。开采这些天体可能为未来的太空探索提供资源，甚至为地球上的工业提供支持。公司和航天机构已经在探索小行星采矿的可能性，这可能会彻底改变我们对资源管理的看法。另一方面，小行星也对我们的星球构成了重大威胁。小行星撞击的潜在可能性是科学家和天文学家非常关注的问题。历史事件，例如恐龙的灭绝，已被与巨大的小行星撞击联系在一起。因此，监测近地小行星已成为全球航天机构的优先事项。各种任务正在进行，以跟踪这些物体并评估它们的轨迹，以预测与地球可能发生的碰撞。近年来，在小行星探索方面取得了显著进展。美国宇航局的OSIRIS-REx任务成功收集了来自小行星Bennu的样本，并计划于2023年将其带回地球。这一开创性的任务旨在分析样本，以了解更多关于早期太阳系及其对行星形成贡献的材料。此外，日本的Hayabusa2任务也从小行星Ryugu返回了样本，为这些古老天体的成分提供了进一步的见解。这些任务突显了对小行星的日益关注及其解锁宇宙秘密的潜力。总之，小行星不仅仅是漂浮在太空中的岩石；它们是帮助我们理解太阳系历史和未来的重要拼图。无论是通过资源开采的潜力还是行星防御的需要，对小行星的研究仍然是一个至关重要的研究领域。随着我们继续探索和了解这些迷人的天体，我们可能会发现新的可能性，这些可能性将塑造人类在太空中的未来。对小行星的迷恋无疑会持续下去，因为我们努力理解自己在宇宙中的位置。