Which round is the sun or the moon? Why is the sun round and the moon curved

Personally, I think it's the moon that's rounder. When the sun is more active, tongues of fire hundreds of thousands to millions of kilometers high erupt from the coronal layer, called "sun". Even when the activity is light or moderate, the extension of the corona reaches the height of several solar radii.

Because the corona is dark, it is not visible to the naked eye. But during a total solar eclipse, there is a thin red ring around the edge of the sun, which is the chromosphere; The hazy light outside the color bulb is the corona. Since the corona is part of the Sun's atmosphere, its activity causes the shape of the Sun to change all the time.

I think it's irresponsible to do that upstairs.

Both the Sun and the Moon have a gravitational pull large enough to make themselves an approximate sphere. But this does not mean that the Sun and Moon are a perfect sphere.

On the surface of the moon, there are uneven mountains, and there is a naked eye observation of the moon on the earth, although it is not obvious, but the celestial phenomenon of "qiong occultation" can be seen during the lunar occultation.

The same is true of the sun, which has a huge surface of the sun, the highest can be tens of millions of kilometers, and can even be clearly seen with the naked eye during a solar eclipse.

Therefore, I personally think that it is irresponsible to do this upstairs, and it is unscientific to rashly give an answer without knowing the intensity of solar activity.

Not round, exactly.

In terms of stability alone, the Moon is more round.

1. Both the Moon and the Sun are spherical celestial bodies. The waxing and waning of the moon that we see is determined by the position of the sun, the earth, and the moon.

2. The moon revolves around the earth, and the period is about days, and because the earth revolves around the sun, the period of the moon phase change is greater than days, about days. On the first day of the lunar calendar, the moon runs between the earth and the sun, so the moon cannot be seen on the earth, which is called "Shuo" or "crescent moon and rock"; Half of the moon can be seen on the seventh or eighth day of the first month, the east is dark, the west is bright, and it is called the "first quarter moon"; At fifteen or sixteen o'clock, the moon moves to the far side of the earth, and the mausoleum can be called to see the round moon hanging high in the sky, which is called "full moon" or "hope"; Around the 22nd, the western half of the moon is dark and the eastern half is bright, which is called the "last quarter moon". The moon is a cycle from the first quarter of the new moon, the full moon to the second quarter of the moon, which is called a lunar month.

The surface of the Moon is made of rock and dust, and like the Earth, it does not emit light on its own, so the lunar phase we see is the part of the Moon that reflects sunlight, and since the New Moon, the phase changes in the order of change in a lunar month: New Moon, First Quarter, Hope, Second Quarter. In the lunar month, the length of time from the new moon is called the lunar season, and the lunar period of hope is 14 days, etc.

Before and after the new moon, the moon's illumination surface is in the shape of an eyebrow, and half of the moon's wheel is visible at the first quarter, while before and after the moon, the moon's sunshine part is cabochon, and the first quarter moon is different from the second quarter moon because the western half of its moon wheel is seen from the earth at the first quarter, and the eastern half of its moon is seen at the bottom wind.

The moon is a satellite of the earth, and the moon and the sun are separated by an earth, the moon keeps rotating around the earth, when it turns to the middle of the earth and the sun, the half illuminated by the sun's light is exactly the back of the earth, and the dark half towards the earth is the dark half, at this time we can't see the moon at all on the earth, which is called "new moon" or "new moon", that is, the first day of the summer calendar.

The moon continued to rotate forward until the beginning of the summer calendar.

On July and August, the sun sets, and the moon is already overhead, and in the middle of the night, the moon sets, and at this time, exactly half of the moon illuminated by the sun is shown to you, which is called "winding". By the tenth day of the summer calendar.

5.16, The Moon turns to the other side of the Earth. At this time, the earth is in the middle of the sun and the moon, and the half of the moon illuminated by the sun is exactly facing the earth, and what we see at this time is the full moon, or "hope". Since the Moon is exactly opposite the Sun, the Sun sets in the west, and the Moon rises in the east, and when the Moon sets, the Sun rises again in the east.

After the full moon, the time of the moon rising is getting later day by day, and the bright part of the moon is getting smaller and smaller day by day, and on the twenty-third day of the summer calendar, the full moon is lost by half, and it only rises in the middle of the night, which is the "last string".

Towards the end of the month, the Moon will rotate again between the Earth and the Sun, and the waning Moon will rise again in the east shortly before sunrise. On the first day of the next month, it is a new moon again, and a new cycle begins.

The moon is seen on the earth in different shapes due to different times, sometimes it is hooked, sometimes it is semicircle, sometimes it is like a disk, gradually excessive, and the cycle begins again and again The moon rotates around the common center of mass of the earth-moon system and also revolves around the sun with the earth The moon is not visible on the first day of the first month, the semicircle is seen on the seventh and eighth days of the first month, the moon is facing west, the full circle is seen at 156, the semicircle is seen at 22 and 23, and the moon is facing east

Why does the moon change in cloudiness and sunshine? As you know, the moon itself does not emit light, but only reflects a part of the sunlight that shines on it, so that for observers on the earth, with the change of the relative position of the sun, the moon, and the earth, the moon takes on different shapes on different days, which is the periodic change of the moon phase. Further, although the moon is always bright when it is illuminated by the sun, because the moon is constantly revolving around the earth and changing its position from time to time, the half sphere facing the earth and the half sphere illuminated by the sun sometimes coincide completely, sometimes not at all, sometimes a small part coincides, sometimes a large part of the moon coincides, so that the moon shows a change of cloudiness and sunshine.

When the moon is between the sun and the earth, its dark hemisphere is facing us, and we cannot see any image of the moon at all, which is "shuo", which astronomically refers to the time when the moon's ecliptic longitude is the same as the sun's ecliptic longitude. On the New Year's Day, the Moon and the Sun rise in the east at the same time, and even the part of the light that the Earth reflects back to the Moon and then from the Moon is completely submerged in the intense solar radiance.

When the earth is between the moon and the sun, although the three planets are also in the same line, at this time, the hemisphere of the moon illuminated by the sun is facing the earth, and the soft moonlight is sprinkled on the earth all night, which is the full moon, that is, "hope". At this time, the ecliptic longitude of the moon and the ecliptic longitude of the sun differ by 180 degrees.

The moon is always round, but because of the light, it appears in our vision"The moon is cloudy and sunny"It's here

To be precise, the moon has a concave and convex surface, which is similar to a sphere, but it is not exactly.

The moon is always garden, and due to its turning around the earth, people see different phases of the moon.

If you have a good mood, no matter whether the moon is round or not, it is round in your heart and will always shine. And when you are in a bad mood, even if the moon is full, it is not so perfect in your heart, so if you want the moon to be round, you should look for happiness.

Scientists at the University of California in the United States have discovered that the moon is not a perfect sphere, but more like a lemon raised on both sides.

If you want to use the moon as the ontology to make the most scientific analogy, then the most appropriate metaphor must be lemon. According to the British "Daily Mail", 45 years after the astronauts landed on the moon, American scientists have finally discovered the most realistic shape of the moon: slightly flattened with a bulge at one end.

The moon appears to be round, but is essentially an oval-shaped sphere.

Not only is the moon round, but most of the celestial bodies in the universe are round.

Have you ever seen the round water droplets on the lotus leaves? Liquid matter must shrink into a spherical shape under its own gravitational force, which is the most basic physical law in the universe, and only by shrinking into a spherical shape can the balance of gravity inside the object be achieved, because the spherical shape is the most perfect and stable. For example, on a microgravity space station, water flows out and automatically shrinks into a spherical shape.

The Moon was also a hot liquid planet in the early days of its birth, so it naturally contracted into a spherical shape under its own gravity, and most of the large celestial bodies in the universe were spherical!

In addition to the initial formation of the Moon (disputed), the process of its development that made the Moon spherical is fundamentally due to the early geological movement of the Moon.

Universal gravitation. action. The geological movement causes the material on the moon to be evenly distributed, and the gravitational force eventually becomes spherical. The role of gravity is crucial!

Generally, when a.

If the mass of a star exceeds a certain threshold, it will be spherical. For example, Ceres, which is 950 kilometers in diameter and spherical in shape, it is.

The smallest known in the solar system.

Dwarf planets, i.e. the smallest spheres.

Celestial body. Of course, the geological movement of the Moon stopped more than a billion years ago, but because the surrounding environment of the Earth-Moon system has been stable for more than a billion years, the Moon has not been subjected to major celestial impacts, so it has maintained its spherical shape, but the mass distribution of the Moon has been uneven.

Upstairs said that the moon is one.

Flat spheres are incorrect! Moon's.

Rotation period. with revolution cycles.

equal, up to 27 days. This makes the moon not like.

The earth rotates like crazy, the moon is not flattened, its flattening rate is only. Even the Earth, its.

The eccentricity is also only 1 298!

Dear, on the question of whether the moon is round or not. Of course the moon is round! The position of the moon rising is in the west at the beginning of the month, and then the rising position gradually moves east, so we see that the moon is not round at the beginning of the month; If it is the middle of the month, the rising position is in the east.

After that, the agenesis position gradually shifts from east to west, so we see that the moon is round (that is, we call the moon circle of fifteen); At the end of the month, when the rising position is in the west, the moon we see is not round again! And dear, not only the moon is round, but most of the stars, stars, moons, and suns that we see and know are round, but our angles are different, so we feel that they are not round!

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Thank me the best!

Just like the earth, it is irregular, and there are many ring-shaped mountains and caves on it. 、