absolute magnitude

简明释义

1. 绝对大小; 2. 绝对星等; 3. 绝对值; 4. 绝对量;

英英释义

例句

1.By knowing the absolute magnitude 绝对星等 of a star, scientists can infer its size and temperature.

通过了解一颗星星的绝对星等 absolute magnitude，科学家可以推断出它的大小和温度。

2.The concept of absolute magnitude 绝对星等 is crucial for understanding the scale of the universe.

理解绝对星等 absolute magnitude 的概念对于理解宇宙的规模至关重要。

3.Using the absolute magnitude 绝对星等, we can determine how far away a star is from Earth.

通过使用绝对星等 absolute magnitude，我们可以确定一颗星星距离地球有多远。

4.The star's absolute magnitude 绝对星等 allows astronomers to compare its brightness with other stars.

这颗星的绝对星等 absolute magnitude 使天文学家能够将其亮度与其他星星进行比较。

5.The absolute magnitude 绝对星等 of this supernova was incredibly bright.

这颗超新星的绝对星等 absolute magnitude 非常耀眼。

作文

In the vast expanse of the universe, stars are not merely points of light; they are celestial bodies that vary significantly in brightness. One of the key concepts in astronomy that helps us understand these differences is the term absolute magnitude. The absolute magnitude of a star refers to its intrinsic brightness, measured as if it were placed at a standard distance of 10 parsecs from Earth. This measurement allows astronomers to compare the true luminosity of different stars without the interference of distance. Understanding absolute magnitude is crucial for several reasons. Firstly, it provides a consistent framework for comparing the brightness of stars. For instance, two stars may appear equally bright from Earth, but one could be much closer than the other. By using absolute magnitude, we can determine which star is actually more luminous. This intrinsic brightness is determined by factors such as the star's size, temperature, and stage of evolution.Moreover, the concept of absolute magnitude is vital when studying stellar populations in galaxies. By analyzing the absolute magnitude of stars within a galaxy, astronomers can infer information about the age and composition of that galaxy. For example, younger stars tend to be brighter and have lower absolute magnitudes compared to older stars, which may have exhausted their nuclear fuel and dimmed over time. This relationship helps researchers piece together the history of galaxy formation and evolution.In addition to its role in stellar classification, absolute magnitude also plays a significant part in distance measurement. The distance to celestial objects can be determined using the distance modulus, which relates the apparent magnitude (how bright a star appears from Earth) to its absolute magnitude. This mathematical relationship is essential for establishing the scale of the universe and understanding the spatial distribution of stars and galaxies.The importance of absolute magnitude extends beyond just stars; it is also applicable to other astronomical objects, such as galaxies and supernovae. For instance, the absolute magnitude of a supernova can provide insights into the energy released during its explosion and the type of progenitor star that led to its demise. By studying the absolute magnitude of various celestial phenomena, astronomers can gain a deeper understanding of the physical processes governing the universe.In conclusion, the concept of absolute magnitude serves as an essential tool in the field of astronomy. It enables scientists to measure and compare the intrinsic brightness of stars and other celestial bodies, providing invaluable insights into their nature and the structure of the universe. As we continue to explore the cosmos, the understanding of absolute magnitude will undoubtedly play a pivotal role in unraveling the mysteries that lie beyond our planet. Through ongoing research and observation, we can further appreciate the beauty and complexity of the universe, guided by the principles that govern the light emitted by its countless stars.

在宇宙的广阔空间中，星星不仅仅是光点；它们是亮度显著不同的天体。天文学中帮助我们理解这些差异的一个关键概念是术语绝对星等。星星的绝对星等指的是其内在亮度，测量时假设它位于离地球10秒差距的标准距离。这一测量使天文学家能够在不受距离干扰的情况下比较不同星星的真实光度。理解绝对星等至关重要，原因有几个。首先，它提供了一个一致的框架，用于比较星星的亮度。例如，两颗星从地球上看起来同样明亮，但其中一颗可能离得更近。通过使用绝对星等，我们可以确定哪颗星实际上更亮。这种内在亮度由星星的大小、温度和演化阶段等因素决定。此外，绝对星等的概念在研究星系中的恒星群体时也至关重要。通过分析星系中恒星的绝对星等，天文学家可以推断出关于该星系的年龄和组成的信息。例如，年轻的恒星往往更亮，其绝对星等较低，而老年恒星可能已经耗尽核燃料，随时间变暗。这一关系帮助研究人员拼凑出星系形成和演化的历史。除了在恒星分类中的作用外，绝对星等在距离测量中也发挥着重要作用。天文学家可以使用距离模数来确定天体的距离，该模数将视星等（星星从地球上看起来的亮度）与其绝对星等联系起来。这一数学关系对于建立宇宙的尺度和理解星星和星系的空间分布至关重要。绝对星等的重要性不仅限于恒星；它也适用于其他天文物体，如星系和超新星。例如，超新星的绝对星等可以提供有关其爆炸过程中释放的能量以及导致其灭亡的前身恒星类型的见解。通过研究各种天体的绝对星等，天文学家可以更深入地理解支配宇宙的物理过程。总之，绝对星等的概念作为天文学领域的重要工具。它使科学家能够测量和比较恒星及其他天体的内在亮度，从而提供对其性质和宇宙结构的宝贵见解。随着我们继续探索宇宙，对绝对星等的理解无疑将在揭示超越我们星球的神秘事物中发挥关键作用。通过不断的研究和观察，我们可以进一步欣赏宇宙的美丽和复杂性，遵循支配其无数恒星发出的光的原则。