planetary precession of the equinoxes

简明释义

行星岁差

英英释义

例句

1.Understanding the planetary precession of the equinoxes is crucial for accurate navigation.

理解春分点的行星岁差对于精确导航至关重要。

2.The ancient Greeks were aware of the planetary precession of the equinoxes and its implications for astronomy.

古希腊人意识到春分点的行星岁差及其对天文学的影响。

3.The planetary precession of the equinoxes affects the timing of seasonal changes on Earth.

春分点的行星岁差影响着地球上季节变化的时间。

4.The study of the planetary precession of the equinoxes reveals how Earth's axial tilt changes over time.

对春分点的行星岁差的研究揭示了地球轴倾角随时间变化的情况。

5.Astronomers must account for the planetary precession of the equinoxes when calculating long-term star positions.

天文学家在计算长期星体位置时必须考虑春分点的行星岁差。

作文

The universe is a vast and intricate system, with celestial bodies moving in ways that can seem bewildering to the untrained eye. One fascinating phenomenon within this cosmic dance is the planetary precession of the equinoxes, which refers to the gradual shift in the orientation of Earth's rotational axis. This shift causes the position of the equinoxes to change over time, leading to various astronomical and climatic effects. Understanding this concept not only enriches our knowledge of astronomy but also highlights the interconnectedness of celestial mechanics and the changing seasons on Earth. To grasp the significance of the planetary precession of the equinoxes (天文岁差), we must first explore the mechanics behind it. The Earth's axis is tilted at an angle of approximately 23.5 degrees relative to its orbit around the Sun. This tilt is responsible for the seasonal variations we experience throughout the year. However, due to gravitational forces exerted by the Sun and the Moon, the axis of the Earth does not remain fixed; instead, it wobbles slightly over a cycle of about 26,000 years. This wobbling motion is what we refer to as precession.As the Earth precesses, the positions of the equinoxes—those points in the year when day and night are of approximately equal length—shift slowly across the backdrop of the stars. This means that the point of the vernal equinox, which traditionally marks the beginning of spring in the Northern Hemisphere, does not always fall on the same star or constellation. Over millennia, this has significant implications for astrology, navigation, and our understanding of time itself. Moreover, the planetary precession of the equinoxes (天文岁差) has been known since ancient times, with early astronomers observing these changes and incorporating them into their calendars and agricultural practices. For instance, the ancient Egyptians aligned their pyramids with specific stars, taking into account the precession to ensure they remained aligned over thousands of years. Similarly, many cultures have myths and legends that reflect their observations of the stars and the changing positions of the equinoxes.In modern times, the implications of this astronomical phenomenon extend beyond cultural significance. Scientists and researchers study the planetary precession of the equinoxes (天文岁差) to understand climate patterns and historical climate changes. By examining tree rings, ice cores, and sediment layers, we can glean insights into how past civilizations adapted to the changing environment influenced by these long-term astronomical cycles. This research underscores the importance of interdisciplinary studies, as it combines elements of astronomy, geology, and anthropology. As we look towards the future, the planetary precession of the equinoxes (天文岁差) serves as a reminder of the dynamic nature of our planet and its place in the universe. It emphasizes the need for continued observation and study of celestial phenomena to better understand our world. Moreover, as humanity faces challenges such as climate change, understanding these long-term cycles may offer valuable lessons about resilience and adaptation. Ultimately, the study of the planetary precession of the equinoxes (天文岁差) is not just an exploration of the cosmos; it is a journey into the very fabric of time and existence itself.

宇宙是一个广阔而复杂的系统，天体以看似令人困惑的方式运动。在这场宇宙舞蹈中，一个迷人的现象是天文岁差，它指的是地球自转轴方向的逐渐变化。这种变化导致春分点的位置随时间而改变，从而引发各种天文和气候效应。理解这一概念不仅丰富了我们对天文学的认识，也突显了天体力学与地球季节变化之间的相互联系。要掌握天文岁差（planetary precession of the equinoxes）的意义，我们首先必须探讨其背后的机制。地球的轴线相对于其围绕太阳的轨道倾斜约23.5度。这一倾斜是我们在一年中经历季节变化的原因。然而，由于太阳和月球施加的引力，地球的轴线并不是固定的；相反，它会在大约26000年的周期内轻微摇摆。这种摇摆运动就是我们所称的岁差。随着地球的岁差，春分点——即一年中白天和夜晚长度大致相等的时刻——在星空背景中缓慢移动。这意味着春分点不再总是落在同一颗星星或星座上。几千年来，这对占星术、导航以及我们对时间本身的理解都有重要影响。此外，天文岁差（planetary precession of the equinoxes）自古以来就为人所知，早期的天文学家观察到这些变化，并将其纳入他们的日历和农业实践中。例如，古埃及人将金字塔与特定星星对齐，考虑到岁差，以确保它们在数千年内保持对齐。同样，许多文化都有反映他们对星星观察和春分位置变化的神话和传说。在现代，这一天文现象的意义超越了文化的重要性。科学家和研究人员研究天文岁差（planetary precession of the equinoxes），以了解气候模式和历史气候变化。通过检查树木年轮、冰芯和沉积层，我们可以洞察过去的文明如何适应这些受长期天文周期影响的变化环境。这项研究强调了跨学科研究的重要性，因为它结合了天文学、地质学和人类学的元素。展望未来，天文岁差（planetary precession of the equinoxes）提醒我们，地球及其在宇宙中的位置是动态的。这强调了继续观察和研究天体现象以更好地理解我们的世界的必要性。此外，随着人类面临气候变化等挑战，理解这些长期周期可能为我们提供关于韧性和适应的重要教训。最终，对天文岁差（planetary precession of the equinoxes）的研究不仅仅是对宇宙的探索；它是对时间和存在本质的旅程。