Alioth =εUrsae Majoris

简明释义

玉衡

英英释义

例句

1.In my astronomy class, we learned that Alioth =εUrsae Majoris is part of the Big Dipper.

在我的天文学课上，我们了解到阿里奥斯 =ε大熊座是北斗七星的一部分。

2.During the summer nights, you can easily spot Alioth =εUrsae Majoris in the sky.

在夏季的夜晚，你可以轻松在天空中找到阿里奥斯 =ε大熊座。

3.Many amateur astronomers use Alioth =εUrsae Majoris as a reference point for locating other stars.

许多业余天文学家使用阿里奥斯 =ε大熊座作为定位其他星星的参考点。

4.When stargazing, I always look for the bright star known as Alioth =εUrsae Majoris.

在观星时，我总是寻找那颗明亮的星星，称为阿里奥斯 =ε大熊座。

5.The star Alioth =εUrsae Majoris is significant for navigation due to its brightness.

由于其亮度，星星阿里奥斯 =ε大熊座在导航中具有重要意义。

作文

In the vast expanse of the night sky, stars have always captivated human imagination. Among these celestial bodies, some stand out not only for their brightness but also for their significance in navigation and astronomy. One such star is Alioth, which is also known as εUrsae Majoris. The name itself might sound unfamiliar to many, but it holds a special place in the constellation of Ursa Major, commonly referred to as the Great Bear. This essay aims to delve into the characteristics of Alioth and its importance in both historical and modern contexts.Firstly, Alioth is the third-brightest star in the Ursa Major constellation, boasting an apparent magnitude of approximately 1.76. This makes it easily visible to the naked eye, even in areas with moderate light pollution. The star is located about 81 light-years away from Earth and is classified as a spectral type A0p, indicating that it is a white giant star. Its brightness and position make Alioth a prominent feature in the northern hemisphere's night sky, often used by astronomers and navigators alike.Historically, εUrsae Majoris has served as a vital reference point for navigation. Sailors and travelers have relied on the stars to guide them for centuries, and Alioth has played a crucial role in this regard. It is part of the asterism known as the Big Dipper, which consists of seven bright stars and is one of the most recognizable patterns in the sky. The two outer stars of the Big Dipper, known as the 'pointer stars,' lead directly to Polaris, the North Star. Therefore, Alioth serves as a stepping stone for those seeking to locate Polaris, making it an invaluable tool for navigation.In addition to its navigational significance, Alioth has also attracted the attention of astronomers due to its unique properties. It is a variable star, meaning that its brightness can change over time. This variability is caused by the star’s pulsations and is of great interest to researchers studying stellar evolution. By observing εUrsae Majoris and its changes in brightness, scientists can gain insights into the life cycles of stars and the physical processes that govern their behavior.Furthermore, Alioth is part of a larger group of stars known as the Ursa Major Moving Group, which shares a common motion through space. This group provides astronomers with valuable data regarding the dynamics of star clusters and the formation of galaxies. Studying εUrsae Majoris within this context allows scientists to piece together the history of our galaxy and understand how different stars interact with one another.In conclusion, Alioth or εUrsae Majoris is much more than just a bright star in the night sky. Its historical significance in navigation, coupled with its scientific importance in the field of astronomy, makes it a fascinating subject of study. As we continue to explore the universe, stars like Alioth remind us of our connection to the cosmos and the enduring mystery of the night sky. Whether for practical navigation or for the pursuit of knowledge, εUrsae Majoris will undoubtedly remain a focal point for stargazers and scientists alike.

在浩瀚的夜空中，星星一直吸引着人类的想象力。在这些天体中，有些因其亮度而脱颖而出，同时也因其在导航和天文学中的重要性而受到重视。其中一颗星星就是Alioth，它也被称为εUrsae Majoris。这个名字对许多人来说可能听起来不熟悉，但它在大熊座（Ursa Major）中占有特殊的位置，通常被称为大熊。本文旨在深入探讨Alioth的特征及其在历史和现代背景下的重要性。首先，Alioth是大熊座中第三亮的星星，视星等约为1.76。这使得它即使在光污染中等的地区也能被肉眼清晰可见。这颗星星距离地球大约81光年，被归类为A0p型谱星，表明它是一颗白色巨星。由于其亮度和位置，Alioth成为北半球夜空中的显著特征，常常被天文学家和导航员所使用。历史上，εUrsae Majoris作为导航的重要参考点，帮助航海者和旅行者在数世纪以来依靠星星来指引方向，而Alioth在这方面发挥了至关重要的作用。它是一个被称为“大勺”（Big Dipper）的星群的一部分，由七颗亮星组成，是夜空中最容易识别的图案之一。大勺的两颗外星被称为“指向星”，直接指向北极星（Polaris）。因此，Alioth成为寻找北极星的一个重要步骤，使其成为导航中不可或缺的工具。除了导航的重要性，Alioth还因其独特的属性而吸引了天文学家的注意。它是一颗变星，意味着它的亮度会随时间变化。这种变化是由于星星的脉动造成的，对研究恒星演化的研究人员而言非常重要。通过观察εUrsae Majoris及其亮度变化，科学家可以深入了解恒星的生命周期以及支配其行为的物理过程。此外，Alioth也是一个更大星群的组成部分，称为大熊运动群，这些星星在空间中共享共同的运动。这个群体为天文学家提供了关于星团动力学和星系形成的宝贵数据。在这一背景下研究εUrsae Majoris使科学家能够拼凑出我们银河系的历史，并理解不同星星之间的相互作用。总之，Alioth或εUrsae Majoris不仅仅是夜空中一颗明亮的星星。它在导航中的历史重要性，加上在天文学领域的科学重要性，使其成为一个引人入胜的研究主题。随着我们继续探索宇宙，像Alioth这样的星星提醒我们与宇宙的联系，以及夜空中持久的神秘感。无论是为了实用的导航，还是为了追求知识，εUrsae Majoris无疑将继续成为观星者和科学家们关注的焦点。