astronomical time

简明释义

天文时天文时间

英英释义

例句

1.The concept of astronomical time 天文时间 helps us understand cosmic events on a larger scale.

<将>天文时间的概念帮助我们在更大范围内理解宇宙事件。

2.When discussing the lifespan of stars, we often refer to astronomical time 天文时间.

在讨论恒星的生命周期时，我们常常提到<将>天文时间。

3.The formation of galaxies takes place over astronomical time 天文时间 scales.

银河系的形成发生在<将>天文时间尺度上。

4.The scientists calculated the age of the universe in terms of astronomical time 天文时间.

科学家们以<将>天文时间计算了宇宙的年龄。

5.In astronomical time 天文时间, a million years is just a blink of an eye.

在<将>天文时间中，一百万年只是眨眼之间。

作文

In the vast realm of astronomy, the concept of astronomical time (天文时间) plays a crucial role in our understanding of the universe. Unlike the conventional time we experience in our daily lives, which is measured in hours, minutes, and seconds, astronomical time encompasses much larger scales, often spanning millions or even billions of years. This broader perspective allows astronomers to study celestial phenomena that occur over extensive periods, such as the life cycles of stars, the formation of galaxies, and the evolution of the universe itself.To grasp the significance of astronomical time (天文时间), one must first appreciate how it differs from our ordinary perception of time. For instance, when we look at the night sky, we are not just seeing stars that exist in the present; many of those stars have already lived and died long before their light reached us. The light from some stars takes thousands of years to travel to Earth, meaning that when we observe them, we are essentially looking back in time. This phenomenon illustrates the importance of astronomical time, as it reminds us that the universe is a dynamic entity, constantly changing and evolving over eons.Additionally, astronomical time (天文时间) is essential for understanding the age of various cosmic structures. For example, scientists use techniques such as radiometric dating to determine the ages of rocks and meteorites, providing insights into the history of our solar system. By comparing these ages with the estimated ages of other celestial bodies, researchers can construct a timeline of events that have shaped the cosmos. This timeline is invaluable for comprehending how different elements in the universe came to be and how they interact with one another.The study of astronomical time (天文时间) also extends to the field of cosmology, where scientists investigate the origins and ultimate fate of the universe. The Big Bang theory, which posits that the universe began as a singularity approximately 13.8 billion years ago, relies heavily on our understanding of astronomical time. By examining the cosmic microwave background radiation and the redshift of distant galaxies, researchers can gather evidence about the universe's expansion and its history.Furthermore, astronomical time (天文时间) influences our understanding of potential future events. For example, the eventual collision of the Milky Way and Andromeda galaxies is predicted to occur in about 4.5 billion years. Such predictions require a deep understanding of astronomical time, as they involve calculations based on the movement of massive celestial bodies over immense distances and timescales.In conclusion, the concept of astronomical time (天文时间) is fundamental to the field of astronomy and our comprehension of the universe. It challenges our conventional notions of time, urging us to think beyond our immediate experiences and consider the vastness of cosmic history. As we continue to explore the universe, the significance of astronomical time will only grow, leading to new discoveries and a deeper appreciation of the intricate tapestry of existence that surrounds us.