astrometric position

简明释义

天体或宇宙飞行器在天球上位置(经过光行差改正

英英释义

例句

1.Astrophysicists rely on astrometric position data to confirm the existence of exoplanets.

天体物理学家依赖天体测量位置数据来确认外星行星的存在。

2.The telescope was calibrated to measure the astrometric position of distant stars.

望远镜经过校准，以测量遥远恒星的天体测量位置。

3.Scientists used the astrometric position data to track the movement of the asteroid.

科学家利用天体测量位置数据来追踪小行星的运动。

4.Accurate astrometric position measurements are crucial for understanding the dynamics of star systems.

准确的天体测量位置测量对于理解恒星系统的动力学至关重要。

5.The satellite's astrometric position helps in mapping the Earth's gravitational field.

卫星的天体测量位置有助于绘制地球的重力场。

作文

The universe is a vast expanse filled with countless celestial bodies, each contributing to the intricate tapestry of our cosmos. Among the various methods used by astronomers to study these celestial objects, astrometry plays a crucial role. One of the key concepts in astrometry is the astrometric position, which refers to the precise location of a celestial object in the sky as determined through meticulous measurements. This position is typically expressed in terms of coordinates, such as right ascension and declination, akin to how we use latitude and longitude on Earth.Understanding the astrometric position of stars and other astronomical entities allows scientists to track their movements and predict their future locations. For instance, by knowing the astrometric position of a star, astronomers can observe its proper motion over time, revealing important information about its trajectory and distance from Earth. This data is essential for constructing models of stellar evolution and understanding the dynamics of our galaxy.Astrometry has evolved significantly over the centuries. In ancient times, astronomers relied on rudimentary tools and naked-eye observations to determine the positions of celestial bodies. However, with the advent of telescopes and sophisticated imaging technology, the accuracy of measuring the astrometric position of stars has improved dramatically. Modern telescopes equipped with advanced sensors can capture images with incredible detail, allowing astronomers to measure the positions of thousands of stars simultaneously.One notable project that exemplifies the importance of astrometric position is the European Space Agency's Gaia mission. Launched in 2013, Gaia aims to create the most comprehensive three-dimensional map of our galaxy by measuring the positions and motions of over a billion stars. By determining the astrometric position of these stars with unprecedented precision, Gaia will help scientists understand the structure and evolution of the Milky Way, as well as identify potential exoplanets and other celestial phenomena.Moreover, the astrometric position is not only relevant for stars but also for planets, asteroids, and other objects within our solar system. For example, tracking the astrometric position of near-Earth objects is vital for assessing potential collision risks and planning future space missions. Accurate measurements of their positions can help scientists devise strategies to mitigate any threats posed by these objects.In conclusion, the concept of astrometric position is fundamental to the field of astronomy. It allows researchers to pinpoint the locations of celestial bodies with remarkable accuracy, paving the way for discoveries that deepen our understanding of the universe. As technology continues to advance, the ability to measure and analyze the astrometric position of various astronomical objects will undoubtedly lead to new insights and revelations about the cosmos we inhabit.

宇宙是一个广阔的空间，充满了无数的天体，每一个都为我们宇宙的复杂织锦做出了贡献。在天文学家研究这些天体的方法中，天体测量学扮演着至关重要的角色。天体测量学中的一个关键概念是天体测量位置，它指的是通过细致的测量确定的天体在天空中的精确位置。这个位置通常用坐标表示，如赤经和赤纬，类似于我们在地球上使用的纬度和经度。理解星星和其他天文实体的天体测量位置使科学家能够跟踪它们的运动并预测它们未来的位置。例如，通过知道一颗星星的天体测量位置，天文学家可以观察其随时间的自行运动，从而揭示关于其轨迹和距离地球的重要信息。这些数据对于构建恒星演化模型和理解我们银河系的动态至关重要。天体测量学在几个世纪中经历了显著的发展。在古代，天文学家依靠简单的工具和裸眼观察来确定天体的位置。然而，随着望远镜和先进成像技术的出现，测量星星的天体测量位置的准确性大幅提高。现代望远镜配备先进的传感器，可以同时捕捉数千颗星星的图像，允许天文学家进行精确的测量。一个突出的项目，体现了天体测量位置的重要性，是欧洲航天局的盖亚任务。盖亚于2013年发射，旨在通过测量超过十亿颗星星的位置和运动，创建我们银河系最全面的三维地图。通过以前所未有的精度确定这些星星的天体测量位置，盖亚将帮助科学家理解银河系的结构和演化，并识别潜在的系外行星和其他天文现象。此外，天体测量位置不仅与星星相关，也与行星、小行星和我们太阳系内的其他物体有关。例如，跟踪近地物体的天体测量位置对评估潜在碰撞风险和规划未来的太空任务至关重要。对它们位置的准确测量可以帮助科学家制定减轻这些物体可能造成的威胁的策略。总之，天体测量位置的概念是天文学领域的基础。它使研究人员能够以惊人的准确性确定天体的位置，为深入理解宇宙的发现铺平了道路。随着技术的不断进步，测量和分析各种天文物体的天体测量位置的能力无疑将导致我们对所处宇宙的新见解和启示。