What will happen if the earth is close to the sun 1000 km?

The earth is moving away from the sun.

In 2004, two Russian astronomers, Gregoriy A. Krasinsky and Victor A. Brumberg, calculated:

The sun and the earth are gradually separated, but not much, only away from 15 cm every year.

Of course, there is an error in this 15 cm.

But it is an indisputable fact that the earth is moving away from the sun.

The core reasons are:

Tidal force between the earth and the sun.

There is also:

The sun radiates a lot of heat every minute, which will make the sun lose matter and lead to the sun's gravity becoming smaller.

The sun loses 4 million tons of weight every second.

Now, back to the original question itself:

……

The answer is:

The distance between the earth and the sun is always near and far.

So it doesn't matter even if it is close to 1000 km.

As shown above.

In July, the farthest distance between the earth and the sun is:

1.52 1 100 million kilometers.

On June+10 in 5438, the nearest distance from the earth to the sun was:

1.47 1 100 million kilometers.

Subtract both:

1.521-1.471= 050,000 km = 5 million km.

That is to say, the distance between the earth and the sun is close when it is far away, and the change period of the distance is:

0 to 5 million kilometers.

In this case, you say that the earth is close to the sun 1000 km. What will happen?

It won't be like this.

I guess this question may want to ask:

What if the farthest distance and the nearest distance between the earth and the sun are both close 1000 km?

The content is as follows:

In July, the farthest distance between the earth and the sun is:

1.52 1 100 million km-1 km

On June+10 in 5438, the nearest distance from the earth to the sun was:

1.47 1 100 million km-1 km

The answer is:

There will still be no change.

Because in a year, the distance between the earth and the sun changes within 0 to 5 million kilometers.

Then this area 1000 km will not change.

Thank you for your concern! I've seen too many loose answers to this question. People often move out of 1000 km. For the average distance of 1.4959787 billion kilometers between the sun and the ground, nine cows and a drop in the bucket are not enough. Moreover, the distance between perihelion and perihelion is still about 5 million kilometers, and the distance between the earth and the sun 1000 kilometers is not enough to cause any change.

In fact, I remember answering a similar question as early as February this year, but the distance involved in that question is relatively weak, only 20 cm. The answer I give is that even if it is nearly 20 centimeters, there are still some subtle changes on the earth, and with the passage of time and accumulation, these subtle changes will have a process of qualitative change to quantitative change, and finally profound changes will take place. After all, why should the earth be close to the earth?

If it is close to 20 cm, you can "think carefully", then it is conceivable to be close to 1000 km. Next, I analyzed the length of the earth's orbit, period of revolution, eccentricity and the earth's surface temperature.

As we all know, the earth revolves around the sun while rotating. Let's not say that the earth's orbit around the sun is elliptical, which is determined by the cosmic environment, and all celestial bodies in the universe abide by this law. For the convenience of calculation, suppose that the orbit from the earth to the sun is circular, and the earth and the sun are infinitesimal points. The original average distance between the sun and the earth is 65.438+0.5 billion kilometers, which is equivalent to the diameter of the earth's revolution around the sun of 300 million kilometers. According to the formula of circle C=2πr or πd, it can be calculated that the length of the earth's orbit (circumference) is 942 million kilometers.

Then the distance between the earth and the sun is 1000 km, that is to say, the diameter of the circle is reduced to 149999 million km, and the circumference of the circle is only 2 * 3.14 *1.49999 = 9.4199372, which is more than the original.

Kilometers). As the orbit of revolution becomes shorter, the speed and period of revolution of the earth will change accordingly.

First of all, as far as the revolution speed of the earth is concerned, the earth needs to have a certain revolution speed, that is, to produce a centrifugal force that is balanced with the gravity of the sun. If it is close to the sun, it can keep this safe distance. At present, the average revolution speed of the earth is about 29.783 km/s, while the nearest Mercury is 47.87 km/s, so it is certain that every time the earth approaches the sun, the revolution speed will increase accordingly.

Secondly, the shortening of the orbit will also affect the period of the earth's revolution. At present, the period of revolution of the Earth is 365.438+09 days (1 year). After all, the revolution speed is accelerated, and the cycle of a revolution is naturally shortened. Take mercury as an example. The period of revolution of Mercury is 87.969 1 day, which is less than three months of the Earth. It is the fastest planet in the solar system. None of them. Due to the shortening of the period of revolution, there will be some subtle changes in the seasons.

Finally, because the distance between the sun and the earth is shortened by 1000 km, it means that the time for sunlight to reach the earth is shortened from 500 seconds to 499.67 seconds. Although theoretically, the higher the altitude angle of the sun, the higher the ground temperature, but the closer to the sun, the corresponding temperature of the earth will rise slightly. Take Pluto as an example, the surface temperature is as low as MINUS 229.

In a word, the earth is a planet that is neither near nor far from the sun, and its position can be said to be a livable zone. Whether the earth is near or far from the sun, it is a phenomenon of cosmic movement, regardless of human will. What we need to do now is to protect the earth on which we live.

In the solar system, the earth just runs in the livable zone. The distance between the earth and the sun is just right, not too close, so that the temperature of the earth is too high and liquid water evaporates; It's not too far away to make the earth's temperature too low and freeze liquid water. If the earth is close to the sun or 1000 kilometers, will it make the earth uninhabitable?

If the earth is away from the sun 1000 km, the solar energy received by the whole earth per unit time will inevitably increase, and vice versa. However, this distance change will hardly affect the climate on the earth.

In fact, the distance between the earth and the sun changes far more than 1000 km, because the orbit of the earth's revolution is elliptical, not a perfect circle. The average distance between the earth and the sun is about 1 4.96 million kilometers (1astronomical unit), the nearest distance is 1.47 1 10,000 kilometers (0.983 astronomical unit), and the farthest distance is 1.52 1 10,000. In other words, the difference between the nearest distance and the farthest distance from the earth to the sun can reach 5 million kilometers, far exceeding the range of 1000 kilometers.

Even if the difference is 5 million kilometers, it will not have any impact on the climate on the earth. In fact, in the process of the earth's revolution, the closer to the sun, the higher the temperature will be. In summer in the northern hemisphere, the earth is actually near the apohelion. At the beginning of July every year, the earth moves to the perihelion, and this year is 6 am on July 5, Beijing time. On the other hand, every year at the beginning of 1 month, the earth will move to the perihelion, that is, winter in the northern hemisphere.

In fact, it can be seen from the opposite climate in the northern and southern hemispheres that the change of the distance between the earth and the sun has little effect on the climate on the earth. No matter near perihelion or apohelion, there is always a hemisphere in summer and a hemisphere in winter. So, what are the factors that affect the seasonal changes of the earth?

If the rotation axis of the earth is perpendicular to the orbital plane, then the sun will shine evenly on both hemispheres, and there will be no seasonal changes on the earth. The inclination of the earth's axis is about 23.4, which makes the part of the earth directly irradiated by sunlight constantly change with the revolution of the earth.

The higher the solar altitude angle, the closer to 90, the greater the solar radiation intensity, so the higher the ground temperature, and vice versa. In a day in the same place, the solar radiation in the morning and evening is weaker than that at noon, which is also because of the change of solar altitude angle. Because of the inclination of the earth's axis, there will be seasonal alternation during the earth's revolution.

Although the change of the distance between the earth and the sun has little effect on the earth's climate, it will affect the length of seasons in the northern and southern hemispheres. Near the perihelion, the sun's attraction to the earth is weak and its revolution speed is slow, so the summer duration in the northern hemisphere is longer than that in the southern hemisphere, and the winter duration is shorter.

In addition, when the earth moves near the perihelion, the temperature of the whole earth will actually be higher. This is because there are more land in the northern hemisphere and more oceans in the southern hemisphere, and the specific heat capacity of land is less than that of ocean, so land is more likely to warm than ocean.

The earth is close to the sun 1000 km, without any change, neither hot nor cold. Why do you think so?

In the solar system, the earth is lucky. Right in the livable zone of the solar system. The so-called livable zone refers to a range where the distance between the planet and the star is just right. In this range, the heat of the star can keep the water on the planet liquid. Now Venus and Mars are at the two edges of the livable zone of the solar system. Therefore, the livable zone is a relatively broad range. As long as the earth is in the livable zone of the solar system, away from the sun or close to the sun, its environment is still suitable for life.

Illustration: Livable zone around stars.

The orbit of the earth around the sun is not a perfect circle, but an ellipse. So sometimes the earth is close to the sun, and sometimes it is far away from the sun. When the earth is closest to the sun, it is called perihelion, and when the earth is farthest from the sun, it is called apohelion. When the earth is at perihelion, it is about 1.5438+0 billion kilometers away from the sun. When the earth is at perihelion, it is about 1.4438+0 billion kilometers away from the sun. The perihelion of the earth is 5 million kilometers closer to the sun than the apohelion.

Illustration: Perihelion and Apohelion of the Earth

This is 5000 times closer than the assumption that the earth is from the sun 1000 km in the title. Has the climate of the earth changed? Let's feel for ourselves. The earth passes through perihelion once a year. Do we feel that the earth is getting warmer after perihelion? Don't! Interestingly, the earth passed the perihelion in January. This is winter in the northern hemisphere, and the temperature in the northern hemisphere is rising instead of falling. What is the reason?

Illustration: Direct sunlight and oblique sunlight are the reasons for the formation of the four seasons on the earth.

The most obvious influence on the earth's temperature change is the direct and oblique sunlight. For example, when the sun shines directly into the northern hemisphere, it is a hot summer in the northern hemisphere; When the sun shines obliquely into the northern hemisphere, the northern hemisphere becomes a cold winter.

The distance between the perihelion and apohelion of the earth is 5 million kilometers, which seems to be a big gap, but it only accounts for one thirtieth of the average distance from the earth to the sun. The impact on the earth's climate is negligible. What's more, the area of 1000 km assumed in the question has no influence on the earth's climate.

Do you agree with this view? Welcome to comment!

What will happen if the earth is close to the sun 1000 km?

Is the earth unique in the solar system? Many people may think so! In fact, the livable zone of the solar system is quite wide, from the inside to the vicinity of Venus and from the outside to the outside of Mars, exceeding the width of 65.438+0 billion kilometers!

But it doesn't mean that all the planets in the livable zone are livable. For example, although Mars is on the outer edge of the livable zone, it is desolate and unsuitable for survival. The livable zone is given by the stars, and the conditions of the planet itself are still too good!

1. If the earth is farther or closer, what impact will it have on the earth?

As mentioned above, the livable zone is so wide, what does it matter if it is closer or farther away? In fact, this relationship is quite big, not to say that the earth can live well anywhere in the livable zone! Because once the ecology of livable planet takes shape, small changes in input parameters will lead to extremely serious consequences.

1, the inside of the livable zone is too close.

The atmospheric pressure on the earth's surface is 100 kPa. At present, under this condition, the positive greenhouse effect is extremely comfortable, because the greenhouse effect is not always bad. Under the comprehensive action of atmospheric circulation, ocean and ground, human beings live and work in peace and contentment, but they may be too comfortable and always want to fight with their families!

But if you get too close, the positive greenhouse effect of the earth will become extremely negative, because too high a temperature will lead to excessive evaporation, and a large amount of water vapor will in turn aggravate the greenhouse effect after entering the atmosphere, which will make the earth's temperature rise into a vicious circle and eventually lead to the end of the earth!

2. The outside of livable area is too far.

Of course, it is easier to cope with the increase of the distance from the sun. As long as it is in the livable zone, it may only enter the ice age. For example, a lot of ice has begun to freeze in the lower latitudes, but the low latitudes near the equator are still livable, just like the world described in 20 12!

2. If the Earth approaches 1000 km, will it have an impact on the Earth?

In fact, the perihelion and apohelion of the earth are more than 5 million kilometers. For the northern hemisphere, apohelion is summer. Do you feel the coolness of the sun after further distance? I'm sure not. I even think we can't live without air conditioning, right? But it's just a feeling. Let's do a simple calculation by mathematical methods. If the earth is close to the sun 1000 meters, how much will the radiation be worse?

According to the spherical volume formula 4/3 π r 3, the difference between them is about 0.2%.

The earth has increased its radiation by about 0.2%, which is even negligible!

Of course, close to 1000 km, the earth will pass faster in a year. Interested friends can use the conservation of angular momentum to calculate how long the earth will become in a year, but it is still a negligible number.

It used to be said that the distance between the earth and the sun is just enough to make the earth in a livable zone, but now it is found that it is just right, and it seems to be adjustable, and the adjustable range must be more than 1000 km.

Among the eight planets in the solar system, the surface temperature of Mercury, which is closest to the sun and faces the sun, is 427, while the average distance between Mercury and the sun is 579 10000km. What about Venus? The temperature of Venus facing the sun is as high as 485℃, but its distance from the sun is108,200,000 kilometers, almost twice that of Mercury. Why is its temperature higher than mercury? This is actually related to the atmosphere and atmospheric composition on the planet.

In fact, from the above example, we can see that in the livable temperature zone, it is not the distance between the earth and the sun that determines the fate of the earth's temperature, but the atmospheric composition of the earth.

The distance between the earth and the sun is149,600,000 km, and the average temperature of the earth is about 15. Compared with 1000km, this astronomical distance has only changed by 149600. What can this small change in distance change the earth? In fact, nothing can change.

The content of carbon dioxide in the atmosphere, that is, greenhouse gases, plays a decisive role in the obvious change of the earth's temperature within the allowable distance between the earth and the sun. The higher the greenhouse gas content, the stronger the heat insulation effect of the atmosphere, and the higher the average temperature of the earth's surface, and vice versa.

The reason why the average surface temperature of Venus is higher than that of Mercury mentioned above is that Venus's atmosphere contains a lot of greenhouse gases.

Therefore, the change brought by bringing the earth close to the sun 1000 km is actually not as great as the change brought by burning more coal at home.

If the distance between the earth and the sun is getting closer and closer, or it is really within the range of 1000 kilometers, there may be a sudden temperature rise to the ground to smoke, and the water will be hot at any time. It is impossible for all plants to absorb water only when they are poured on them. But water is evaporated by the heat of the sun every day, and then it will rain anytime and anywhere. Only in this way can human beings have a chance. In addition, another scenario may be that everything suffers a devastating disaster. The history of civilization is just a passing sight, and everything is equal to the end.

It is only nearly a thousand kilometers, which does not affect the energy of sunlight. The difference is not particularly big, but the orbit may change a little.

The earth will explode. Don't think that only flour will explode, and everything on the earth can burn. As long as the temperature is enough, the whole earth will detonate.

The earth is close to the sun 1000 km, and there must be some changes. Just like a person is 0/0 meters away from the fire/kloc-0, let you get close to 5 meters, what will you feel or change? At this time, you will feel warm and sweaty from head to toe, and so will the earth, which will become hot and have a certain impact on the earth.

First of all, it has a certain impact on human survival. The sun constantly transfers heat to the earth, which leads to the global greenhouse effect. The earth's temperature rises, making it difficult for human beings to travel, leading to ground drought. Because of the high temperature, crops evaporate quickly on the ground and cannot grow.

Secondly, the frequent occurrence of natural disasters is directly related to the melting of polar glaciers. Everyone should know that vernal equinox, summer solstice, autumn equinox and winter solstice are four seasons, especially in summer. For those of us who live in the northern hemisphere, the summer sun is very poisonous. When the earth revolves from vernal equinox to the summer solstice, it is the hottest time of the year (see diagram).

Because at this time, most of the heat of the sun shines in the northern hemisphere. At this time of summer, there is no night in the Arctic, only day. If the earth is 1000 km away from the sun, this can be imagined.

On the solstice in winter, the sun shines directly on the southern hemisphere, just like the northern hemisphere, so the northern hemisphere in winter will not be as hot as in summer, because most of the sun shines on the winter solstice in the southern hemisphere. At this time, there is no night in the south pole of the southern hemisphere, only day. The vernal equinox is the same as the autumnal equinox. It will be hot, but it is not so obvious. The distance is getting closer and closer, which leads to the typhoon.