celestial sphere

简明释义

天球

英英释义

例句

1.The celestial sphere 天球 is an imaginary sphere where all celestial bodies appear to be projected.

在celestial sphere 天球上，所有天体似乎都被投影在一个想象的球面上。

2.Navigators use the celestial sphere 天球 to determine their position based on the stars.

航海者使用celestial sphere 天球根据星星来确定他们的位置。

3.In ancient times, people believed that the Earth was at the center of the celestial sphere 天球.

在古代，人们相信地球位于celestial sphere 天球的中心。

4.The concept of the celestial sphere 天球 helps astronomers visualize the positions of stars and planets in the night sky.

天文学家利用celestial sphere 天球的概念来帮助他们可视化夜空中星星和行星的位置。

5.When observing the celestial sphere 天球, one can see how constellations move across the sky.

观察celestial sphere 天球时，可以看到星座如何在天空中移动。

作文

The concept of the celestial sphere has fascinated astronomers and philosophers for centuries. It is an imaginary sphere that surrounds the Earth, onto which all celestial bodies, such as stars and planets, are projected. This idea helps us understand the movement of these celestial objects in a way that is easier to visualize and comprehend. The celestial sphere serves as a fundamental tool in astronomy, aiding in navigation and the study of the night sky.In ancient times, civilizations such as the Greeks and the Babylonians utilized the concept of the celestial sphere to explain the apparent motion of stars and planets. They believed that the stars were fixed on this sphere, rotating around the Earth, which they considered to be at the center of the universe. This geocentric model dominated astronomical thought until the heliocentric theory proposed by Copernicus, which placed the Sun at the center of our solar system. Despite the shift in understanding, the celestial sphere remained a useful model for mapping the heavens.One of the key features of the celestial sphere is the celestial equator, which is an extension of the Earth's equator into space. It divides the sphere into the northern and southern celestial hemispheres. The poles of the celestial sphere correspond to the Earth's poles, with the north celestial pole being near the star Polaris. This positioning allows astronomers to use the celestial sphere to locate stars and constellations based on their coordinates, much like how we use latitude and longitude on Earth.Furthermore, the celestial sphere is essential for understanding celestial navigation. Sailors and aviators have relied on the positions of stars, which appear to move across the celestial sphere due to the rotation of the Earth, to determine their location and direction. By knowing the position of a few key stars, navigators can pinpoint their location on the globe, demonstrating the practical application of the celestial sphere in everyday life.With the advent of modern technology, such as telescopes and satellites, our understanding of the universe has expanded far beyond the limitations of the celestial sphere. However, this concept remains a crucial part of astronomical education. Students are taught to visualize the night sky using the celestial sphere, helping them grasp the relationships between different celestial objects.In conclusion, the celestial sphere is more than just an abstract concept; it is a vital tool that has shaped our understanding of the universe. From ancient civilizations to modern astronomy, the celestial sphere has provided a framework for exploring the cosmos. As we continue to study the stars and planets, the importance of the celestial sphere will undoubtedly endure, serving as a bridge between our earthly experiences and the vastness of space.

“天球”的概念几个世纪以来一直吸引着天文学家和哲学家。它是一个想象中的球体，围绕着地球，所有的天体，如星星和行星，都被投影到这个球体上。这个想法帮助我们以更容易可视化和理解的方式理解这些天体的运动。“天球”作为天文学中的一个基本工具，有助于导航和研究夜空。在古代，希腊人和巴比伦人等文明利用“天球”的概念来解释星星和行星的表观运动。他们认为星星固定在这个球体上，围绕地球旋转，而他们认为地球是宇宙的中心。这种地心说模型主导了天文学思想，直到哥白尼提出的日心说理论，将太阳置于我们的太阳系中心。尽管理解发生了变化，“天球”仍然是绘制天空的有用模型。“天球”的一个关键特征是天赤道，它是地球赤道向太空延伸的部分。它将球体分为北半球和南半球。天球的极点对应于地球的极点，北天极靠近北极星。这种定位使天文学家能够使用“天球”根据坐标找到星星和星座，就像我们在地球上使用纬度和经度一样。此外，“天球”对于理解天文导航至关重要。水手和飞行员依靠星星的位置，这些星星由于地球的自转而在“天球”上移动，以确定他们的位置和方向。通过知道一些关键星星的位置，导航员可以准确定位在地球上的位置，展示了“天球”在日常生活中的实际应用。随着现代技术的出现，如望远镜和卫星，我们对宇宙的理解已远远超出了“天球”的局限。然而，这个概念仍然是天文学教育的重要组成部分。学生们被教导使用“天球”来可视化夜空，帮助他们掌握不同天体之间的关系。总之，“天球”不仅仅是一个抽象概念；它是一个重要的工具，塑造了我们对宇宙的理解。从古代文明到现代天文学，“天球”提供了一个探索宇宙的框架。随着我们继续研究星星和行星，“天球”的重要性无疑将持续存在，作为我们地球体验与浩瀚空间之间的桥梁。