parsec

简明释义

英[ˈpɑːsek]美[ˈpɑrˌsek]

n. 秒差距（表示天体间距离的单位）

英英释义

单词用法

同义词

反义词

例句

1.And then you have to convince the whole world that you have actually detected something like this in the atmosphere of an extrasolar planet host star somewhere in 100 parsec away from here.

再来你必须说服整个世界，你的确侦测到像这样的物质，在太阳系外行星的宿主恒星大气中，在离这里100秒差距的地方。

2.How to implement subscript operators in Parsec?

如何在秒差距实现下标操作符？

3.Utilizing the message interaction mechanism of PARSEC, which is running environment of GloMoSim, automatization of multi-scheme comparison and batch simulation is implemented in GloMoSim.

多方案对比及批量仿真是学术研究中无线网络仿真需求的基本特点。

4.And then you have to convince the whole world that you have actually detected something like this in the atmosphere of an extrasolar planet host star somewhere in 100 parsec away from here.

再来你必须说服整个世界，你的确侦测到像这样的物质，在太阳系外行星的宿主恒星大气中，在离这里100秒差距的地方。

5.One 秒差距 is equivalent to about 3.26 light-years.

一个秒差距大约等于3.26光年。

6.Astronomers often use 秒差距 to measure vast distances in space.

天文学家通常使用秒差距来测量宇宙中的巨大距离。

7.The nearest star, Proxima Centauri, is about 4.24 秒差距 away from Earth.

最近的恒星比邻星距离地球大约4.24秒差距。

8.The Andromeda Galaxy is approximately 780 秒差距 from Earth.

仙女座星系距离地球大约780秒差距。

9.When studying the universe, scientists often refer to distances in 秒差距.

在研究宇宙时，科学家们经常用秒差距来表示距离。

作文

In the vastness of the universe, distances are often measured in units that are difficult for the average person to comprehend. One such unit is the parsec, which is a term derived from the combination of 'parallax' and 'arcsecond'. A parsec is equivalent to approximately 3.26 light-years, or about 19 trillion miles. This measurement is crucial in the field of astronomy, as it allows scientists to quantify the immense distances between celestial bodies. The concept of the parsec is particularly important when discussing the motion of stars and galaxies in relation to Earth.To understand how a parsec is determined, one must first grasp the principle of parallax. Parallax is the apparent shift in position of an object when viewed from different angles. Astronomers use this principle by observing a star from two different points in Earth's orbit around the Sun, six months apart. By measuring the angle of the shift in the star's position against more distant background stars, they can calculate the distance to that star in parsecs. This method is fundamental for measuring distances to nearby stars, making the parsec a vital tool in the astronomical toolkit.The significance of the parsec extends beyond mere distance measurement. It also plays a critical role in our understanding of the structure and scale of the universe. For example, the nearest star system to Earth, Alpha Centauri, is located about 1.34 parsecs away. This proximity allows astronomers to study the characteristics of stars and their potential for hosting exoplanets, which is essential for the ongoing search for extraterrestrial life.Moreover, the use of parsecs helps astronomers communicate effectively about cosmic distances. Given that the universe is so vast, using kilometers or miles would result in unwieldy numbers that are hard to interpret. The parsec provides a more manageable unit for discussing distances on a cosmic scale. For instance, when we talk about the Milky Way galaxy, which is about 100,000 light-years in diameter, it translates to roughly 30,000 parsecs. This simplification aids in grasping the enormity of our galaxy and its place in the universe.In addition to its practical applications, the parsec has also entered popular culture. Science fiction literature and films often reference parsecs as a way to describe interstellar travel. Notably, the term was famously misused in the movie "Star Wars" when Han Solo claimed to have made the Kessel Run in less than twelve parsecs. This statement confused audiences, as a parsec is a unit of distance, not time. However, it sparked interest in the term and led many to learn more about the fascinating world of astronomy.In conclusion, the parsec is more than just a unit of measurement; it is a gateway to understanding the universe's vastness and complexity. By grasping the concept of the parsec, we can appreciate the incredible distances that separate us from other stars and galaxies. As we continue to explore the cosmos, the parsec will remain an essential element in our quest to unravel the mysteries of the universe.

在宇宙的浩瀚中，距离常常以普通人难以理解的单位来衡量。其中一个单位是秒差距，这个术语来源于“视差”和“弧秒”的组合。一个秒差距大约等于3.26光年，或约19万亿英里。这个测量在天文学领域至关重要，因为它使科学家能够量化天体之间的巨大距离。秒差距的概念在讨论恒星和星系相对于地球的运动时尤其重要。要理解如何确定秒差距，首先必须掌握视差的原理。视差是当从不同角度观察物体时，物体位置的表观变化。天文学家通过在地球绕太阳公转的两个不同点（相隔六个月）观察一颗恒星，利用这一原理。通过测量恒星相对于更远背景恒星的位置变化角度，他们可以计算出该恒星的距离，以秒差距为单位。这种方法对于测量邻近恒星的距离至关重要，使得秒差距成为天文学工具箱中的重要工具。秒差距的重要性不仅限于距离测量。它还在我们理解宇宙的结构和规模方面发挥着关键作用。例如，离地球最近的恒星系统，阿尔法·半人马星，距离大约1.34秒差距。这种接近性使天文学家能够研究恒星的特征及其宿主外星行星的潜力，这对持续寻找外星生命至关重要。此外，使用秒差距有助于天文学家有效地交流关于宇宙距离的信息。由于宇宙如此浩瀚，使用公里或英里会导致难以处理的庞大数字。秒差距为讨论宇宙尺度上的距离提供了更可管理的单位。例如，当我们谈论银河系时，它的直径约为100,000光年，换算成大约30,000秒差距。这种简化有助于理解我们银河系的巨大以及它在宇宙中的位置。除了其实际应用外，秒差距也已进入流行文化。科幻文学和电影经常提到秒差距，作为描述星际旅行的方式。值得注意的是，在电影《星球大战》中，汉·索罗声称他在不到十二秒差距的时间内完成了凯瑟尔跑。这一说法让观众感到困惑，因为秒差距是一个距离单位，而不是时间。然而，这引发了人们对这个术语的兴趣，并使许多人了解到天文学的迷人世界。总之，秒差距不仅仅是一个测量单位；它是理解宇宙浩瀚与复杂性的门户。通过掌握秒差距的概念，我们可以欣赏到将我们与其他恒星和星系分开的惊人距离。随着我们继续探索宇宙，秒差距将继续成为我们揭开宇宙奥秘的必不可少的元素。