megaparsec

简明释义

英[ˈmeɡəˌpɑːsek]美[ˈmeɡəˌpɑrsek]

n. [天] 百万秒差距

英英释义

单词用法

同义词

反义词

例句

1.The most widely accepted value for the Hubble constant right now is 72 kilometers per second per megaparsec, obtained by the Hubble Space Telescope.

目前哈勃常数最被广泛认可的值是每秒每百万秒差距72千米，这个值是由哈勃空间望远镜测出的。

2.The most widely accepted value for the Hubble constant right now is 72 kilometers per second per megaparsec, obtained by the Hubble Space Telescope.

目前哈勃常数最被广泛认可的值是每秒每百万秒差距72千米，这个值是由哈勃空间望远镜测出的。

3.The nearest galaxy, Andromeda, is approximately 0.78 megaparsec (百万秒差距) away from us.

最近的星系，仙女座，距离我们大约0.78 megaparsec (百万秒差距)。

4.The observable universe is about 46.5 megaparsec (百万秒差距) in radius.

可观测宇宙的半径约为46.5 megaparsec (百万秒差距)。

5.The Hubble Space Telescope has helped us measure distances in megaparsec (百万秒差距) with unprecedented precision.

哈勃太空望远镜帮助我们以前所未有的精度测量了megaparsec (百万秒差距) 的距离。

6.Astronomers often measure the distance to celestial objects in megaparsec (百万秒差距) for better accuracy.

天文学家通常使用megaparsec (百万秒差距) 来测量天体的距离，以获得更好的准确性。

7.A cluster of galaxies can span several megaparsec (百万秒差距) across.

一个星系团可以横跨几个megaparsec (百万秒差距)。

作文

In the vast expanse of the universe, distances are measured in units that are often beyond our everyday comprehension. One such unit is the megaparsec, which is equivalent to one million parsecs. To put this into perspective, a parsec is approximately 3.26 light-years, making a megaparsec roughly 3.26 million light-years. This unit is commonly used in astronomy to describe the distances between galaxies and other celestial objects. Understanding the concept of megaparsec is crucial for astronomers as they study the structure and evolution of the universe.The term 'parsec' itself comes from a combination of 'parallax' and 'arcsecond.' It is derived from the method used to measure astronomical distances by observing the apparent motion of stars against more distant background objects as Earth orbits the Sun. The megaparsec extends this measurement to larger scales, allowing scientists to quantify distances on a cosmic scale. For instance, when we say that the Andromeda Galaxy is about 0.78 megaparsec away, we are indicating that it is approximately 2.5 million light-years from Earth.Using megaparsec as a standard unit helps astronomers communicate effectively about the vastness of space. For example, the Milky Way galaxy is situated about 0.001 megaparsec from the nearby dwarf galaxy, the Sagittarius Dwarf Elliptical Galaxy. Such measurements are essential for understanding the gravitational interactions between galaxies and their formation processes.Moreover, the concept of megaparsec plays a significant role in cosmology, the study of the universe's origin and development. The Hubble Space Telescope has provided valuable data on the expansion of the universe, with distances often expressed in megaparsec. By measuring the redshift of light from distant galaxies, astronomers can determine how fast these galaxies are moving away from us, leading to insights about the rate of expansion of the universe.In summary, the megaparsec is an essential unit of measurement in astronomy that allows scientists to describe the enormous distances between celestial bodies. Whether discussing the distance to neighboring galaxies or the overall structure of the cosmos, the megaparsec provides a framework for understanding our place in the universe. As we continue to explore the cosmos, the importance of accurately measuring distances in megaparsec will only grow, enhancing our knowledge of the universe and its mysteries.

在宇宙的广袤空间中，距离的测量单位往往超出我们日常的理解。其中一个单位是百万秒差距，相当于一百万秒差距。为了更好地理解这一点，一个秒差距大约等于3.26光年，因此百万秒差距大约是326万光年。这个单位通常用于天文学中，用来描述星系和其他天体之间的距离。理解百万秒差距的概念对于天文学家研究宇宙的结构和演化至关重要。“秒差距”这个术语本身来源于“视差”和“弧秒”的组合。它源于通过观察恒星相对于更遥远背景物体的明显运动来测量天文距离的方法，因为地球围绕太阳公转。百万秒差距将这种测量扩展到更大的尺度，使科学家能够量化宇宙尺度上的距离。例如，当我们说仙女座星系距离地球大约0.78百万秒差距时，我们指的是它距离地球约250万光年。使用百万秒差距作为标准单位，帮助天文学家有效地交流关于空间浩瀚的知识。例如，银河系与附近的矮星系——人马座矮椭圆星系之间的距离大约为0.001百万秒差距。这样的测量对于理解星系之间的引力相互作用及其形成过程至关重要。此外，百万秒差距的概念在宇宙学中也扮演着重要角色，即研究宇宙起源和发展的学科。哈勃太空望远镜提供了有关宇宙膨胀的重要数据，距离通常用百万秒差距表示。通过测量来自遥远星系的光的红移，天文学家可以确定这些星系远离我们的速度，从而获得关于宇宙膨胀速率的见解。总之，百万秒差距是天文学中一个重要的测量单位，使科学家能够描述天体之间的巨大距离。无论是在讨论邻近星系的距离还是宇宙的整体结构，百万秒差距都提供了理解我们在宇宙中位置的框架。随着我们继续探索宇宙，准确测量百万秒差距中的距离的重要性只会增加，增强我们对宇宙及其奥秘的认识。