aphelion

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数据源: ai_enrichment
aphelion 指行星、彗星等天体在绕太阳公转的椭圆轨道上距离太阳最远的那个点,是天文学中的专业术语。

用法要点

介词搭配

aphelion 通常与介词 at 或 in 连用,表示“在远日点”的位置或状态,用于描述天体运行的具体位置。

• at aphelion
• in aphelion
• reach aphelion

句型结构

常用于被动语态或系表结构,如“Earth is at aphelion”,或与动词如 reach、pass 搭配,表示到达或经过远日点。

• Earth reaches aphelion in July.
• The comet passed its aphelion.

语域说明

aphelion 是高度专业的天文学词汇,主要用于学术、科普或技术语境,日常对话中较少使用,需根据上下文明确解释。

• scientific papers on aphelion
• astronomy textbooks mention aphelion

基础例句

Earth is at aphelion in early July each year, when it's farthest from the Sun.

地球每年七月初处于远日点,此时距离太阳最远。

I learned in school that aphelion affects seasonal changes slightly.

我在学校学到,远日点会轻微影响季节变化。

The astronomy club discussed how to observe aphelion with telescopes.

天文俱乐部讨论了如何用望远镜观测远日点。

高级例句

In astrophysics, calculating aphelion is crucial for predicting comet trajectories and orbital stability.

在天体物理学中,计算远日点对于预测彗星轨迹和轨道稳定性至关重要。

The research paper analyzes temperature variations at Mars' aphelion to model climate patterns.

这篇研究论文分析了火星远日点的温度变化,以模拟气候模式。

During the space mission briefing, engineers emphasized the fuel efficiency at aphelion for long-duration flights.

在太空任务简报中,工程师强调了远日点对长期飞行的燃料效率影响。

高频搭配

verb

reachpassapproachcalculateobserve

adjective

planetarycometarydistantmaximumorbital

noun

EarthMarscometorbitdistanceperihelion

adverb

approximatelytypicallyrecentlyscientifically

preposition

atinduringnear

phrase

at aphelionaphelion distanceaphelion and perihelionaphelion passage

常见错误

❌ 错误:The aphelion is when the Earth is closest to the Sun.
✓ 正确:The aphelion is when the Earth is farthest from the Sun.

错误混淆了 aphelion(远日点)和 perihelion(近日点)。Aphelion 指最远点,需准确记忆以避免概念错误。

❌ 错误:We can see aphelion with naked eyes in the sky.
✓ 正确:We cannot see aphelion directly; it's a calculated point in an orbit.

错误认为 aphelion 是可见物体。实际上,它是轨道上的抽象点,需通过计算或仪器观测,不能直接用肉眼看到。

近义词辨析

perihelion

perihelion 指天体轨道上距离太阳最近的点,与 aphelion(最远点)相对,两者常成对使用于天文学中描述轨道极端位置。

Earth's aphelion occurs in July, while its perihelion is in January, affecting seasonal insolation.

apsis

apsis 是更广义的术语,指椭圆轨道上距离焦点最远或最近的点,包括 aphelion(对于太阳)和类似概念(如 perigee 对于地球),而 aphelion 特指以太阳为焦点时的最远点。

In orbital mechanics, apsis refers to extreme points, with aphelion being the apsis farthest from the Sun.