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2022-02-07 01:07:46

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『壹』 月亮,地球,太阳,星星的关系.神奇的宇宙

这个是等比计算的问题。
比如说你在距离10米远的地方看一个直径10米球体，它的视直径是60度，你距离100米远的地方看一个直径100米的球体，视直径还是60度。前者刚好可以把后者遮住。
月亮、太阳、地球其实也是这样的关系，
经过很多年的演化，今天的天空，月亮刚好可以把太阳遮住，因为太阳距离地球是月亮距离地球的400倍，而太阳直径刚好也是月球的400倍。在地球上月亮可以把太阳完全遮住，具体到本次日全食，月球的视直径是33分31秒，太阳的视直径是31分27秒，食分达到1.08。
其实月球是以每年2里面离地球远去的，在恐龙时代看到的月亮比今天大得多，当时的日全食可以持续十几分钟，而且没有日环食（因为在月球远地点能遮住太阳）。但是再过10亿年，当月亮在近地点都无法遮住太阳的时候，我们就再也看不见日全食，只能看到日环食了。
至于为什么没有半个月亮大的星星，那是因为太阳系的行星半径太小，视直径只有零点几秒。而太阳系外的恒心离地球又太远了，最近的也有几十光年，就算它体积再大，我们看起来也很小很小了。这也是只手遮天的道理（透视、近大元小）。

『贰』 为什么月亮是人类探索宇宙的第一个星球月球上有什么

自古以来，夜晚仰望星空就可以看到明月高悬，夜晚的月亮和夜空中的其他星辰不同，它冰冷璀璨如同白玉，并且白天中只有太阳，太阳的光芒太过炽热无法直视，相比之下月亮要更加平易近人一些。时代在进步，人类对宇宙中天体的运动也有了更加深入地了解，特别是太阳和月亮这两个天体，一个给地球带来了光和热，一个是距离地球最近的星球。毫无疑问，探索月球肯定是人类走向宇宙的第一步。那么为什么月亮是人类探索宇宙的第一个星球？月球上有什么？

在地球上，各种无线电信号形成了一种我们看不到的“污染”，对于科学家来说，地球上的无线电信号干扰会对他们探索宇宙造成巨大的干扰，而在月球的背面月球的磁场可以完全屏蔽地球上杂乱的电波干扰。如果可以在月球的背面建造一个电波望远镜的话，可以帮助人类破解更多宇宙深处的秘密。因为地球上的信号干扰，电波望远镜在低频观测段无法得到有用信息，而月球背面的望远镜可以填补这个空白。这样的天文望远镜可能是人类发现外星文明关键，甚至可以帮助我们了解宇宙起源和宇宙诞生后第一批恒星的信息。未来的月球可能会是人类探索宇宙的前哨站，也是破解宇宙秘密的第一步。

『叁』 月球在宇宙中存活了多少年

通过对月球岩石的分析，月球与地球的年龄是相同的。
也就是说大约46亿年。

甚至有说法：月球是在一次强烈的矮行星撞击中，从地球分裂出去的。

『肆』 月球的存在，对人类、对宇宙来说意义何在呢

我们知道在我们地球附近有一颗卫星，这颗卫星就是月球，月球每天都会围绕地球进行旋转，所以我们每天都能够在同一时间看见月球，出现在晚上的夜空当中。月球是非常的美丽的，白色的球体，让很多中国古诗人对月球产生的一种向往之情，也有很多诗歌是在赞颂月球。就像苏轼词中所唱到的那样：“明月几时有，把酒问青天。”关于月球的存在对于人类对宇宙的意义何在呢？这其中的原因是大约有以下几点。

最后一点就是对于整个宇宙来说，则会失去其中之一的星球，虽然说不痛不痒，但是万千星球之一也是对于宇宙重要的组成。

『伍』 月球属于宇宙嘛

世界的一切空间都是宇宙的

『陆』 从月球到多元宇宙这个视频是谁制作的

答:从月球到多元宇宙这个视频事实应该是休.埃弗雷特制作的。

『柒』 月球`宇宙`太阳、地球排列

大小:宇宙，太阳，地球，月球
远近:宇宙，太阳，地球，因月球围绕地球转，所以远近不定。
望采纳

『捌』 从月球上看宇宙和地球是什么样子

在月球上，因为没有大气干扰，也没有光污染，所以看宇宙天体会看得更加清晰。但坐标定位就比在地球上难多了[包括在两极]。
因为地球比月儿大，所以地球的块头比在地球看月亮大得多。
在地球之外看地球的照片已经很多了，包括很美丽的，在此不当搬运工，请上网自便。

『玖』 有关月球和宇宙的资料

月球也称太阴，俗称月亮。是地球唯一的天然卫星，也是离地球最近的天体，还是研究得最彻底的天体。人类至今唯一一个亲身访问过的天体就是月球。月球是最明显的天然卫星的例子。在太阳系里，除水星和金星外，其他行星都有天然卫星。月球的年龄大约有46亿年。月球有壳、幔、核等分层结构。最外层的月壳平均厚度约为60-65公里。月壳下面到1000公里深度是月幔，它占了月球的大部分体积。月幔下面是月核，月核的温度约为1000度，很可能是熔融状态的。月球直径约3476公里，是地球的3/11、太阳的1/400。月球的体积只有地球的1/49，质量约7350亿亿吨，相当于地球质量的1/81左右，月球表面的重力差不多是地球重力的1/6。
月球表面有阴暗的部分和明亮的区域。早期的天文学家在观察月球时，以为发暗的地区都有海水覆盖，因此把它们称为“海 ”。著名的有云海、湿海、静海等。而明亮的部分是山脉，那里层峦叠嶂，山脉纵横，到处都是星罗棋布的环形山。位于南极附近的贝利环形山直径295公里，可以把整个海南岛装进去。最深的山是牛顿环形山，深达8788米。除了环形山，月面上也有普通的山脉。高山和深谷叠现，别有一番风光.
月球的背面地图月球的正面永远都是向着地球，其原因是潮汐长期作用的结果。另外一面，除了在月面边沿附近的区域因天秤动而中间可见以外，月球的背面绝大部分不能从地球看见。在没有探测器的年代，月球的背面一直是个未知的世界。月球背面的一大特色是几乎没有月海这种较暗的月面特征。而当人造探测器运行至月球背面时，它将无法与地球直接通讯。
月球约一个农历月绕地球运行一周，而每小时相对背景星空移动半度，即与月面的视直径相若。与其他卫星不同，月球的轨道平面较接近黄道面，而不是在地球的赤道面附近。
相对于背景星空，月球围绕地球运行(月球公转)一周所需时间称为一个恒星月；而新月与下一个新月（或两个相同月相之间）所需的时间称为一个朔望月。朔望月较恒星月长是因为地球在月球运行期间，本身也在绕日的轨道上前进了一段距离。
因为月球的自转周期和它的公转周期是完全一样的，地球上只能看见月球永远用同一面向着地球。自月球形成早期，地球便一直受到一个力矩的影响引致自转速度减慢，这个过程称为潮汐锁定。亦因此，部分地球自转的角动量转变为月球绕地公转的角动量，其结果是月球以每年约38毫米的速度远离地球。同时地球的自转越来越慢，一天的长度每年变长15微秒。
月球对地球所施的引力是潮汐现象的起因之一。月球围绕地球的轨道为同步轨道，所谓的同步自转并非严格。由于月球轨道为椭圆形，当月球处于近地点时，它的自转速度便追不上公转速度，因此我们可见月面东部达东经98度的地区，相反，当月处于远地点时，自转速度比公转速度快，因此我们可见月面西部达西经98度的地区。这种现象称为经天秤动。

严格来说，地球与月球围绕共同质心运转，共同质心距地心4700千米（即地球半径的2/3处）。由于共同质心在地球表面以下，地球围绕共同质心的运动好像是在“晃动”一般。从地球北极上空观看，地球和月球均以迎时针方向自转；而且月球也是以迎时针绕地运行；甚至地球也是以迎时针绕日公转的。
很多人不明白为什么月球轨道倾角和月球自转轴倾角的数值会有这么大的变化。其实，轨道倾角是相对于中心天体（即地球）而言的，而自转轴倾角则相对于卫星。
月球的轨道平面（白道面）与黄道面（地球的公转轨道平面）保持着5.145 396°的夹角，而月球自转轴则与黄道面的法线成1.5424°的夹角。因为地球并非完美球形，而是在赤道较为隆起，因此白道面在不断进动（即与黄道的交点在顺时针转动），每6793.5天（18.5966年）完成一周。期间，白道面相对于地球赤道面（地球赤道面以23.45°倾斜于黄道面）的夹角会由28.60°（即23.45°+ 5.15°） 至18.30°（即23.45°- 5.15°）之间变化。同样地，月球自转轴与白道面的夹角亦会介乎6.69°（即5.15° + 1.54°）及3.60°（即5.15° - 1.54°）。月球轨道这些变化又会反过来影响地球自转轴的倾角，使它出现±0.002 56°的摆动，称为章动。
白道面与黄道面的两个交点称为月交点－－其中升交点（北点）指月球通过该点往黄道面以北；降交点（南点）则指月球通过该点往黄道以南。当新月刚好在月交点上时，便会发生日食；而当满月刚好在月交点上时，便会发生月食。
月球背面的结构和正面差异较大。月海所占面积较少，而环形山则较多。地形凹凸不平，起伏悬殊最长和最短的月球半径都位于背面，有的地方比月球平均半径长4公里，有的地方则短5公里（如范德格拉夫洼地）。背面未发现“质量瘤”。背面的月壳比正面厚，最厚处达150公里，而正面月壳厚度只有60公里左右。
月球本身并不发光，只反射太阳光。月球亮度随日、月间角距离和地、月间距离的改变而变化。平均亮度为太阳亮度的1/465000，亮度变化幅度从1/630000至1/375000。满月时亮度平均为 -12.7等（见）。它给大地的照度平均为0.22勒克斯，相当于100瓦电灯在距离21米处的照度。月面不是一个良好的反光体，它的平均反照率只有7％，其余93％均被月球吸收。月海的反照率更低，约为 6％。月面高地和环形山的反照率为17％，看上去山地比月海明亮。月球的亮度随而变化，满月时的亮度比上下弦要大十多倍。
由于月球上没有大气，再加上月面物质的热容量和导热率又很低，因而月球表面昼夜的温差很大。白天，在阳光垂直照射的地方温度高达+127℃；夜晚，温度可降低到-183℃。这些数值，只表示月球表面的温度。用射电观测可以测定月面土壤中的温度，这种测量表明，月面土壤中较深处的温度很少变化，这正是由于月面物质导热率低造成的。
从月震波的传播了解到月球也有壳、幔、核等分层结构。最外层的月壳厚60～65公里。月壳下面到1,000公里深度是月幔，占了月球大部分体积。月幔下面是月核。月核的温度约1,000℃，很可能是熔融的，据推测大概是由Fe-Ni-S和榴辉岩物质构成。
平均轨道半径 384,401千米
轨道偏心率 0.0549
近地点距离 363,300千米
远地点距离 405,500千米
平均公转周期 29.53天
平均公转速度 1.023千米/秒
轨道倾角 在28.58°与18.28°之间变化(与黄道面的交角为5.145°)
升交点赤经 125.08°
近地点辐角 318.15°
默冬章 (repeat phase/day) 19 年
平均月地距离 ~384 400 千米
交点退行周期 18.61 年
近地点运动周期 8.85 年
食年 346.6 天
沙罗周期 (repeat eclipses) 18 年 10/11 天
轨道与黄道的平均倾角 5°9'
月球赤道与黄道的平均倾角 1°32'
赤道直径 3,476.2 千米
两极直径 3,472.0 千米
扁率 0.0012
表面面积 3.976×10^7平方千米
体积 2.199×10^10 立方千米
质量 7.349×10^22 千克
平均密度 水的3.350倍
赤道重力加速度 1.62 m/s2 (地球的1/6)
逃逸速度 2.38千米/秒
自转周期 27天7小时43分11.559秒（同步自转）
自转速度 16.655 米/秒（于赤道）
自转轴倾角 在3.60°与6.69°之间变化 (与黄道的交角为1.5424°)
反照率 0.12
满月时视星等 -12.74
表面温度(t) -233~123℃ （平均-23℃）
大气压 1.3×10-10 千帕月球的自转
月球在绕地球公转的同时进行自转，周期27.32166日，正好是一个恒星月，所以我们看不见月球背面。这种现象我们称“同步自转”，几乎是卫星世界的普遍规律。一般认为是行星对卫星长期潮汐作用的结果。天平动是一个很奇妙的现象，它使得我们得以看到59%的月面。主要有以下原因：
1、在椭圆轨道的不同部分，自转速度与公转角速度不匹配。
2、白道与赤道的交角。

『一』 The relationship between the moon, the earth, the sun and the stars. The magical universe

This is a problem of proportional calculation.
For example, if you look at a sphere with a diameter of 10 meters from a distance of 10 meters, its apparent diameter is 60 degrees. If you look at a sphere with a diameter of 100 meters from a distance of 100 meters, the apparent diameter will still be 60 degrees. The former can just cover the latter.
The moon, the sun, and the earth actually have the same relationship.
After many years of evolution, in today’s sky, the moon can just cover the sun, because the distance between the sun and the earth is 400 times that of the moon, and The diameter of the sun is also exactly 400 times that of the moon. On the earth, the moon can completely cover the sun. For this total solar eclipse, the apparent diameter of the moon is 33 minutes and 31 seconds, the apparent diameter of the sun is 31 minutes and 27 seconds, and the eclipse minute reaches 1.08.
In fact, the moon moves away from the earth every 2 months. The moon seen in the dinosaur era was much larger than today. The total solar eclipse at that time could last for more than ten minutes, and there was no annular solar eclipse (because at the lunar apogee can block the sun). But in another billion years, when the moon cannot cover the sun at perigee, we will no longer be able to see a total solar eclipse, only an annular solar eclipse.
As for why there are no stars as big as half a moon, it is because the radius of the planets in the solar system is too small, with an apparent diameter of only a few tenths of a second. The center of perseverance outside the solar system is too far away from the earth, and the nearest one is dozens of light years away. No matter how large it is, it looks very small to us. This is also the principle of covering the sky with one hand (perspective, near big and small).

『二』Why is the moon the first planet for humans to explore the universe? What is on the moon

Since ancient times, you can see the bright moon hanging high when you look up at the stars at night. It is different from other stars in the night sky. It is as cold and bright as white jade, and there is only the sun during the day. The sun's light is too hot to look directly at. In comparison, the moon is more approachable. As the times progress, humans have a deeper understanding of the movement of celestial bodies in the universe, especially the sun and the moon. One brings light and heat to the earth, and the other is the closest planet to the earth. There is no doubt that exploring the moon is the first step for mankind to enter the universe. So why is the moon the first planet humans explored in the universe? What's on the moon?

On the earth, various radio signals form a kind of "pollution" that we cannot see. For scientists, the interference of radio signals on the earth will hinder their exploration. The universe causes huge interference, and on the far side of the moon, the moon's magnetic field can completely shield the messy radio wave interference on the earth. If a radio telescope can be built on the back of the moon, it can help mankind decipher more secrets of the deep universe. Because of signal interference on the earth, radio telescopes cannot obtain useful information in the low-frequency observation segment, and telescopes on the far side of the moon can fill this gap. Such an astronomical telescope may be the key to mankind's discovery of extraterrestrial civilizations, and may evenInformation that helps us understand the origin of the universe and the first stars after its birth. The future moon may be an outpost for human exploration of the universe and the first step in deciphering the secrets of the universe.

『三』How many years has the moon survived in the universe

Through the analysis of lunar rocks, the age of the moon and the earth are the same.
That is about 4.6 billion years.

It is even said that the moon was separated from the earth in a strong dwarf planet impact.

『四』What does the existence of the moon mean to human beings and the universe?

We know that there is a satellite near our earth. This satellite is the moon, and the moon will erupt every day. It rotates around the earth, so we can see the moon at the same time every day, appearing in the night sky. The moon is very beautiful. The white sphere makes many ancient Chinese poets yearn for the moon. There are also many poems praising the moon. Just like what Su Shi sang in his poem: "When will the bright moon come? Ask the sky for wine." What is the significance of the existence of the moon to mankind and the universe? The reasons for this are roughly the following.

The last point is that for the entire universe, one of the planets will be lost. Although it is not painful, one of the thousands of planets is also an important component of the universe.

『五』 The moon belongs to the universe

All spaces in the world belong to the universe

『Lu』 Who made the video From the Moon to the Multiverse?

Answer: The video "From the Moon to the Multiverse" was probably produced by Hugh Everett.

『撒』 Moon, Universe, Sun and Earth Arrangement

Size: Universe, Sun, Earth, Moon
Far and near: Universe, Sun, Earth, because the Moon surrounds the Earth It rotates, so the distance is uncertain.
Hope to adopt it

『8』What does the universe and the earth look like from the moon?

On the moon, because there is no atmospheric interference and no light pollution, it is better to see the universe and the sky. Experience seeing more clearly. But coordinate positioning is much more difficult than on Earth [including at the poles].
Because the earth is larger than the moon, the earth is much larger than the moon when viewed from the earth.
There are many photos of the Earth from outside the Earth, including very beautiful ones. I am not here to be a porter, so please go online for your own convenience.

『九』 Information about the moon and the universe

The moon is also called the lunar moon, commonly known as the moon. It is the Earth's only natural satellite, the closest celestial body to the Earth, and the most thoroughly studied celestial body. The only celestial body that humans have visited in person so far is the moon. The Moon is the most obvious example of a natural satellite. In the solar system, except for Mercury and Venus, all other planets have natural satellites. The moon is approximately 4.6 billion years old. The moon has a crust, mantle, and coreetc. hierarchical structure. The average thickness of the outermost lunar crust is about 60-65 kilometers. Below the lunar crust to a depth of 1,000 kilometers is the lunar mantle, which accounts for most of the moon's volume. Below the lunar mantle is the lunar core. The temperature of the lunar core is about 1,000 degrees, and it is likely to be in a molten state. The diameter of the moon is about 3476 kilometers, which is 3/11 of the earth and 1/400 of the sun. The moon's volume is only 1/49 of the Earth's, and its mass is about 735 billion tons, which is equivalent to about 1/81 of the Earth's mass. The gravity on the moon's surface is almost 1/6 of the Earth's gravity.
The moon's surface has dark parts and bright areas. When early astronomers observed the moon, they thought that the dark areas were covered with sea water, so they called them "sea". The famous ones include the Sea of ​​Clouds, the Sea of ​​Shit, the Sea of ​​Tranquility, etc. The bright part is the mountains, where there are many mountains, criss-crossing mountains, and dotted craters everywhere. Bailey Crater, located near the South Pole, has a diameter of 295 kilometers and can fit the entire Hainan Island into it. The deepest mountain is Newton Crater, which is 8,788 meters deep. In addition to craters, there are also ordinary mountains on the moon. High mountains and deep valleys overlap, creating a unique scenery.
Map of the far side of the moon. The front side of the moon always faces the earth. The reason is the long-term effect of tides. On the other side, most of the far side of the moon cannot be seen from the Earth, except for the area near the edge of the moon that is visible in the middle due to the movement of the scales. In the era before detectors, the far side of the moon has always been an unknown world. One of the distinctive features of the far side of the Moon is that there are almost no maria, the darker lunar surface features. When the man-made probe moves to the far side of the moon, it will not be able to communicate directly with the earth.
The moon orbits the Earth once in about one lunar month, and moves half a degree relative to the background starry sky every hour, which is similar to the apparent diameter of the moon. Unlike other satellites, the Moon's orbital plane is closer to the ecliptic plane than to the Earth's equatorial plane.
Relative to the background starry sky, the time it takes for the moon to orbit the earth (moon revolution) is called a sidereal month; and the time it takes for a new moon to the next new moon (or between two same moon phases) is called For a synodic moon. The synodic moon is longer than the sidereal moon because the earth itself advances a certain distance in its orbit around the sun during the movement of the moon.
Because the moon's rotation period is exactly the same as its revolution period, the earth can only see the same side of the moon always facing the earth. Since the early formation of the Moon, the Earth has been subject to a torque that causes its rotation to slow down. This process is called tidal locking. Therefore, part of the angular momentum of the Earth's rotation is converted into the angular momentum of the Moon's revolution around the Earth. As a result, the Moon moves away from the Earth at a speed of about 38 millimeters per year. At the same time, the Earth's rotation is getting slower and slower, and the length of the day is getting longer by 15 microseconds every year.
The gravitational pull exerted by the moon on the earth is one of the causes of tides. The Moon's orbit around the Earth is a synchronous orbit, and the so-called synchronous rotation is not strictly enforced. Since the Moon's orbit is elliptical, when the Moon is at perigee, its rotation speed cannot keep up with the Earth's orbit.The rotation speed is faster, so we can see the area in the eastern part of the moon that reaches 98 degrees east longitude. On the contrary, when the moon is at apogee, the rotation speed is faster than the revolution speed, so we can see the area in the west of the moon that reaches 98 degrees west longitude. This phenomenon is called meridian movement.

Strictly speaking, the earth and the moon revolve around a common center of mass, which is 4,700 kilometers away from the center of the earth (that is, 2/3 of the earth’s radius). Since the common center of mass is below the Earth's surface, the motion of the Earth around the common center of mass appears to be "rocking." Viewed from above the Earth's North Pole, both the Earth and the Moon rotate in a clockwise direction; the Moon also orbits the Earth in a clockwise direction; and even the Earth orbits the Sun in a clockwise direction.
Many people don't understand why the values ​​of the Moon's orbital inclination and the Moon's rotational axis have changed so much. In fact, the orbital inclination is relative to the central celestial body (i.e. the Earth), while the rotation axis inclination is relative to the satellite.
The moon's orbital plane (the ecliptic plane) maintains an angle of 5.145 396° with the ecliptic plane (the earth's orbital plane), while the moon's rotation axis forms an angle of 1.5424° with the normal to the ecliptic plane. Because the Earth is not a perfect sphere, but rather bulges at the equator, the ecliptic plane is constantly precessing (that is, the intersection with the ecliptic rotates clockwise), completing one cycle every 6793.5 days (18.5966 years). During this period, the angle between the ecliptic plane and the equatorial plane of the Earth (the Earth's equatorial plane is tilted at 23.45° to the ecliptic plane) will change from 28.60° (i.e. 23.45° + 5.15°) to 18.30° (i.e. 23.45°- 5.15°). Similarly, the angle between the moon's axis of rotation and the ecliptic plane will also be between 6.69° (i.e. 5.15° + 1.54°) and 3.60° (i.e. 5.15° - 1.54°). These changes in the moon's orbit will in turn affect the inclination of the earth's rotation axis, causing it to wobble by ±0.002 56°, which is called nutation.
The two intersections of the ecliptic plane and the ecliptic plane are called lunar nodes - the ascending node (north point) refers to the point where the moon passes to the north of the ecliptic plane; the descending node (south point) refers to the point where the moon passes to the north. South of the ecliptic. A solar eclipse occurs when the new moon is exactly on the lunar nodes, and a lunar eclipse occurs when the full moon is exactly on the lunar nodes.
The structure of the far side of the moon is quite different from that of the front side. The maria occupies less area and has more craters. The terrain is uneven and undulating. The longest and shortest lunar radii are located on the far side. Some places are 4 kilometers longer than the average radius of the moon, and some places are 5 kilometers shorter (such as Van de Graaf Depression). No "mass tumors" were found on the back. The moon crust on the back side is thicker than the front side, with a maximum thickness of 150 kilometers, while the thickness of the moon crust on the front side is only about 60 kilometers.
The moon itself does not emit light, it only reflects sunlight. The brightness of the moon changes with the angular distance between the sun and the moon and the distance between the earth and the moon. The average brightness is 1/465000 of the brightness of the sun, and the brightness changes from 1/630000 to 1/375000. The average brightness of a full moon is -12.7 magnitude (see). The average illumination it gives to the earth is 0.22 lux, which is equivalent to the illumination of a 100-watt electric lamp at a distance of 21 meters. The moon is not a good reflector. Its average albedo is only 7%, and the remaining 93% is absorbed by the moon. The albedo of the lunar maria is even lower, around 6%. The albedo of the lunar highlands and craters is 17%, making the mountains appear brighter than the lunar maria. The brightness of the moon changes accordingly, and the brightness of the full moon is more than ten times greater than that of the first and second quarters.
Since there is no atmosphere on the moon, and the heat capacity and thermal conductivity of the lunar surface materials are very low, the temperature difference between day and night on the lunar surface is large. During the day, the temperature in places where the sun shines vertically is as high as +127°C; at night, the temperature can drop to -183°C. These values ​​only represent the temperature of the moon's surface. The temperature in the lunar soil can be measured using radio observations. This measurement shows that the temperature in the deeper parts of the lunar soil rarely changes. This is due to the low thermal conductivity of the lunar material.
From the propagation of lunar shock waves, we learned that the moon also has a layered structure such as crust, mantle, and core. The outermost lunar crust is 60 to 65 kilometers thick. Below the lunar crust to a depth of 1,000 kilometers is the lunar mantle, which accounts for most of the moon's volume. Below the lunar mantle is the lunar core. The temperature of the lunar core is about 1,000°C, and it is likely to be molten. It is speculated that it is composed of Fe-Ni-S and eclogite materials.
Average orbital radius 384,401 kilometers
Orbital eccentricity 0.0549
Perigee distance 363,300 kilometers
Apogee distance 405,500 kilometers
Average orbital period 29.53 days
Average Revolution speed 1.023 kilometers/second
Orbital inclination changes between 28.58° and 18.28° (the angle with the ecliptic plane is 5.145°)
Ascending node right ascension 125.08°
Perigee argument 318.15 °
Metonic chapter (repeat phase/day) 19 years
Average moon-earth distance ~384 400 kilometers
Nodal retrograde period 18.61 years
Perigee motion period 8.85 years
Eclipse year 346.6 days
Saros cycles (repeat eclipses) 18 years 10/11 days
The average inclination of the orbit to the ecliptic is 5°9'
The average inclination of the moon's equator to the ecliptic is 1°32 '
Equator diameter 3,476.2 kilometers
Pole diameter 3,472.0 kilometers
Oblateness 0.0012
Surface area 3.976×10^7Square kilometers
Volume 2.199×10^10 cubic kilometers
Mass 7.349×10^22 kilograms
3.350 times the average density of water
Equator gravity acceleration 1.62 m/s2 (Earth 1/6)
Escape velocity 2.38 kilometers/second
Spin period 27 days, 7 hours, 43 minutes, 11.559 seconds (synchronous rotation)
Spin speed 16.655 meters/second (at the equator)
/> The tilt of the rotation axis varies between 3.60° and 6.69° (the angle with the ecliptic is 1.5424°)
Albedo 0.12
Apparent magnitude of the full moon -12.74
Surface temperature (t) -233~123℃ (average -23℃)
Atmospheric pressure 1.3×10-10 kPa Rotation of the moon
The moon rotates while revolving around the earth, with a period of 27.32166 days, which is exactly one sidereal month. So we can't see the far side of the moon. We call this phenomenon "synchronous rotation", and it is almost a universal law in the satellite world. It is generally believed to be the result of the long-term tidal effect of the planet on the satellite. Libra motion is a wonderful phenomenon that allows us to see 59% of the moon. The main reasons are as follows:
1. In different parts of the elliptical orbit, the rotation speed does not match the revolution angular speed.
2. The angle between the white equator and the equator.