analemma

简明释义

英[ˌænə'lemə]美[ˌænə'lemə]

n. 日行迹；赤纬时差图，太阳“8”字轨迹图

复 数 a n a l e m m a s 或 a n a l e m m a t a

英英释义

单词用法

同义词

反义词

例句

1.The sun seems to rise from behind the hills near the Tholos, a circular building in the sanctuary of Athena Pronaia in ancient Delphi, in an analemma photo composite made in Greece in 2001.

从2001年希腊制作的8字曲线合成照片中，你可以看到太阳好似从Tholos——古特尔斐的雅典娜圣域一幢圆形建筑——附近的山后升起来。

2.One disk of the sun shines like a pendant on a celestial necklace in the first known analemma photo to feature a total solar eclipse.

在突出了日全食特点已知最早的8字曲线照片中，有一个太阳圆盘像天体项链上的垂饰似的闪耀光芒。

3.The first analemma photograph ever made-created over New England in the U.S. between 1978 and 1979-stands as one of the few analemma pictures in the world that does not use a composited foreground.

历史上第一张8字曲线照片——1978年至1979年期间，在美国新格兰创作的照片——是世界上为数不多的没有使用合成前景的8字曲线照片之一。

4.The first analemma photograph ever made-created over New England in the U.S. between 1978 and 1979-stands as one of the few analemma pictures in the world that does not use a composited foreground.

历史上第一张8字曲线照片——1978年至1979年期间，在美国新格兰创作的照片——是世界上为数不多的没有使用合成前景的8字曲线照片之一。

5.So far, only about 20 people worldwide have released successful analemma photos, according to Babak Tafreshi, founder of the astrophotography website the world at Night (TWAN).

天体摄影术网站TheWorldatNight (TWAN)创始人巴巴克·塔弗莱希透露，迄今为止，世界各地只有约20人公布了成功的8字曲线照片。

6.On Mars, meanwhile, the analemma would look more like a teardrop.

而在火星上，这个8字曲线会更像一滴泪珠。

7.This analemma photo-composite shows the sun's path as it appeared over Girona, Spain, from March 2003 to March 2004.

这张8字曲线合成照片显示了2003年3月至2004年3月，太阳出现在西班牙赫罗纳上空时的路径。

8.Analemma photographs are made by taking a picture of the sun from the same place at the same time of day once or twice a week, generating 30 to 50 frames.

每天在同一时间、同一地点拍一幅太阳照片，每周一至两次，产生30至50帧画面，制作而成8字曲线照片。

9.The sun's highest point in the sky, seen in this analemma, occurs during the summer solstice, while its lowest point is during winter solstice.

夏至期间，你能看到从8字曲线中看到的太阳在空中最高点，在冬至期间能够看到其最低点。

10.Astronomers use the analemma to understand the variations in solar time compared to clock time.

天文学家使用analemma来理解太阳时间与钟表时间之间的变化。

11.To accurately track the sun's path, you might create an analemma using a simple sundial.

为了准确追踪太阳的轨迹，你可以使用简单的日晷创建一个analemma。

12.You can find the analemma in many textbooks on astronomy and navigation.

你可以在许多天文学和导航教科书中找到analemma。

13.The shape of the analemma is caused by the tilt of the Earth's axis and its elliptical orbit around the sun.

由于地球轴的倾斜和其围绕太阳的椭圆轨道，analemma 的形状形成。

14.The analemma is a figure-eight diagram that shows the position of the sun in the sky at the same time each day throughout the year.

在一年中的每一天相同时间，analemma 是一个显示太阳在天空中位置的八字形图。

作文

The concept of analemma is a fascinating intersection of astronomy and geometry that captures the intricate dance between the Earth and the Sun. Essentially, an analemma is a figure-eight diagram that represents the position of the Sun in the sky at the same time each day throughout the year. This unique shape arises from the Earth's axial tilt and its elliptical orbit around the Sun. Understanding the analemma not only deepens our appreciation for the complexities of our solar system but also has practical applications in fields such as navigation and timekeeping.To visualize an analemma, imagine standing in one spot and observing the Sun's position at noon every day for a year. If you were to plot these positions on a graph, you would create a figure-eight shape that reflects the variations in the Sun's apparent position due to the Earth's tilt and orbital eccentricity. This phenomenon can be attributed to two main factors: the tilt of the Earth's axis and the varying speed at which the Earth travels along its elliptical path around the Sun.The axial tilt of approximately 23.5 degrees causes the Sun to appear higher in the sky during summer months and lower during winter months, contributing to the vertical component of the analemma. Meanwhile, the elliptical nature of Earth's orbit means that the planet moves faster when it is closer to the Sun and slower when it is farther away, affecting the horizontal component of the analemma. Together, these factors create the characteristic shape of the analemma.One of the most interesting aspects of the analemma is its relationship with timekeeping. Historically, sundials relied on the position of the Sun to tell time, and understanding the analemma was crucial for accurate measurements. In fact, the difference between solar time (as indicated by the Sun) and clock time can vary significantly throughout the year due to the effects captured by the analemma. This discrepancy is known as the equation of time, and it can lead to differences of up to 16 minutes between solar noon and clock noon.In modern times, while we rely heavily on precise atomic clocks, the analemma still holds significance for astronomers and navigators. For instance, satellite positioning systems utilize calculations based on the Sun's position, which can be influenced by the analemma. Additionally, understanding the analemma can enhance our knowledge of celestial mechanics and improve our ability to predict solar events, such as eclipses.Moreover, the analemma serves as a beautiful reminder of the dynamic nature of our planet's relationship with the Sun. It encourages us to look up and appreciate the celestial mechanics that govern our daily lives. As we observe the changing position of the Sun throughout the year, we are reminded of the intricate balance of forces at play in our solar system.In conclusion, the analemma is not just a mathematical curiosity; it embodies the complex interactions between the Earth and the Sun. By studying the analemma, we gain insights into the nature of time, the mechanics of our solar system, and even the history of human attempts to measure time accurately. As we continue to explore the cosmos, the analemma stands as a testament to the beauty and complexity of the universe we inhabit.

“分析图”是一个迷人的天文学和几何学的交汇点，捕捉了地球与太阳之间复杂的舞蹈。基本上，“分析图”是一个八字形的图表，代表了太阳在一年中的同一时间在天空中的位置。这种独特的形状源于地球的轴倾角和它围绕太阳的椭圆轨道。理解“分析图”不仅加深了我们对太阳系复杂性的欣赏，而且在导航和计时等领域也有实际应用。为了可视化“分析图”，想象一下站在一个地方，每天中午观察太阳的位置。如果你在一年内将这些位置绘制在图表上，你将创建一个反映太阳由于地球的倾斜和轨道偏心率而产生的明显位置变化的八字形。这种现象可以归因于两个主要因素：地球轴的倾斜和地球在其椭圆路径上移动的速度变化。大约23.5度的轴倾角导致太阳在夏季的天空中看起来更高，而在冬季则更低，这为“分析图”的垂直分量做出了贡献。同时，地球轨道的椭圆形状意味着当地球靠近太阳时，它的移动速度更快，而当它远离太阳时，速度较慢，从而影响“分析图”的水平分量。这两个因素共同创造了“分析图”的特征形状。“分析图”最有趣的方面之一是它与计时的关系。历史上，日晷依靠太阳的位置来告诉时间，而理解“分析图”对于准确测量至关重要。事实上，由太阳指示的太阳时间和钟表时间之间的差异可能会因“分析图”所捕捉的效应而在一年中显著变化。这种差异被称为时间方程，它可能导致太阳中午和钟表中午之间的差异达到16分钟。在现代，尽管我们在很大程度上依赖精确的原子钟，但“分析图”在天文学家和导航员中仍然具有重要意义。例如，卫星定位系统利用基于太阳位置的计算，这可能会受到“分析图”的影响。此外，理解“分析图”可以增强我们对天体力学的知识，并改善我们预测太阳事件（如日食）的能力。此外，“分析图”作为我们与太阳之间动态关系的美丽提醒，鼓励我们仰望天空，欣赏支配我们日常生活的天体力学。当我们观察太阳在一年中的变化位置时，我们被提醒到我们太阳系中各个力量之间的复杂平衡。总之，“分析图”不仅仅是一个数学好奇心；它体现了地球与太阳之间复杂的相互作用。通过研究“分析图”，我们获得了对时间本质、我们太阳系力学的洞察，甚至人类尝试准确测量时间的历史。随着我们继续探索宇宙，“分析图”作为我们所居住宇宙的美丽和复杂性的证明而屹立不倒。