synodic period

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数据源: ai_enrichment
会合周期是指两个天体(如行星或卫星)相对于地球或彼此,连续两次处于相同相对位置(如合或冲)所需的时间间隔。

用法要点

句型搭配

通常用作名词短语,在句子中作主语或宾语,描述天文学中的时间概念,常与表示计算、测量或比较的动词搭配。

• calculate the synodic period
• the synodic period of Mars
• compare synodic periods

介词用法

常用介词 'of' 连接具体天体(如行星、卫星),表示所属关系;'between' 用于两个天体之间;'in' 表示在某个周期内。

• synodic period of the Moon
• synodic period between Earth and Venus
• in a synodic period

语域说明

主要用于天文学、航天科学等学术或专业领域,日常对话中较少使用,属于正式或技术性词汇。

• academic papers on synodic periods
• technical reports in astronomy
• scientific discussions

基础例句

The synodic period of the Moon is about 29.5 days, which is why we have full moons each month.

月球的会合周期大约是29.5天,这就是为什么我们每个月都有满月。

In astronomy class, we learned how to calculate the synodic period between two planets.

在天文学课上,我们学习了如何计算两个行星之间的会合周期。

The synodic period helps predict when planets will be visible in the night sky.

会合周期有助于预测行星何时会在夜空中可见。

高级例句

Researchers used telescopic data to determine the synodic period of Jupiter's moons with high precision.

研究人员利用望远镜数据高精度地确定了木星卫星的会合周期。

In the astrophysics paper, the authors compared the synodic periods of exoplanets to understand orbital dynamics.

在天体物理学论文中,作者比较了系外行星的会合周期以理解轨道动力学。

Space mission planners account for synodic periods to optimize launch windows for interplanetary travel.

太空任务规划者考虑会合周期,以优化星际旅行的发射窗口。

高频搭配

verb

calculatemeasuredetermineobservecompare

adjective

lunarplanetaryaverageexactrelative

noun

MoonMarsplanetsatellitecycle

adverb

approximatelypreciselyregularlyrelatively

preposition

ofbetweenforin

phrase

synodic period of the Moonsynodic period between Earth and Marscalculate the synodic periodaverage synodic period

常见错误

❌ 错误:The synodic period is the time for a planet to orbit the Sun.
✓ 正确:The synodic period is the time for a planet to return to the same position relative to Earth.

错误混淆了会合周期和轨道周期。会合周期是基于地球视角的相对时间,而轨道周期是行星绕太阳一周的绝对时间。

❌ 错误:We can see the synodic period with a telescope.
✓ 正确:We can observe celestial events that repeat with a synodic period using a telescope.

会合周期是一个时间概念,不能被直接'看见'。正确用法是描述通过望远镜观察周期性天文现象。

近义词辨析

orbital period

轨道周期是指天体绕中心天体(如太阳)一周所需的时间,是绝对时间;而会合周期是基于观察者(如地球)的相对时间,涉及两个天体的相对运动。

The orbital period of Mars is 687 days, but its synodic period relative to Earth is about 780 days.

cycle

周期是一个更通用的术语,指任何重复事件的时间间隔;会合周期特指天文学中两个天体相对位置重复的时间,是周期的一种具体类型。

The lunar cycle includes phases like new moon and full moon, which correspond to its synodic period.