2021-06-10

Venus is 79 million kilometers closer than Mars. Why do humans only go to Mars and not Venus?

By yqqlm yqqlm

Among the eight planets, the earth is the third closest planet to the sun, and Venus and Mars in the back is the sister planet of the Earth.

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but compared to being detected by human frequent visits to Mars,Venus, which is closer to the earth and whose mass and volume are more similar to the earth /span>, but few human detectors visit.

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Know that the average distance between Venus and the earth is only 41 million kilometers, while the average distance between Mars and the earth is 120 million kilometers, and the closest is 54 million kilometers. , The farthest can reach 400 million kilometers. Today, when chemical power spacecraft fuel is extremely expensive,Why do astronomers want to find the distance between Venus and Mars?

Venus:Venus

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In the night sky of the earth,

span>Venus is the well-deserved”brightest star in the night sky”Astronomers later discovered that the reason why Venus is so bright is because of its The atmosphere is too thick.

but and Different Earth’s atmosphere, Venus’ atmosphere is almost entirely composed of Carbon dioxide and other greenhouse gases, which means that under the thick atmosphere of Venus, In fact, it hides a harsh environment of high temperature and high pressure,Livability is linked to The moon is not as good as.

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After all, although the moon does not have an atmosphere, there is no high-pressure environment. Scientists can also establish bases on the surface of the moon or underground, and the high temperature and high pressure on the surface of Venus The environment directly cut off the possibility of astronauts landing on Venus and building Venus.

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The data sent back by Mariner 2 in 1962 shows thatSurface Venus, with a temperature of 425°C, also has 92 times the atmospheric pressure of the Earth In addition to these shocking data, Venus It is also a planet where volcanic activity is very frequent, and sulfuric acid rain is the normal state of this planet.

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And with the increase of detectors later, the so-called”Venus face” and”Venus city ruins” taken by the previous low-resolution cameras were also dismissed, and the public was also lost Interest in Venus.

But is Venus always a high-temperature, high-pressure, desolate and dead planet?

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The answer is no, because the early sun was far less bright than today, so Venus, which was closer to the sun, was The position of the solar system is equivalent to the status of today’s earth, an out-and-out Livable planet.

according to American famous astronomer and popular science writerCarl .Sagan’s research,The Venus catastrophe originated from the out-of-control of carbon dioxide and other greenhouse gases, and these greenhouse gases come from the frequent volcanic activity of Venus.

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In the absence of green plants to absorb carbon dioxide, Venus’s greenhouse effect has become more and more serious, and finally it has become today’s high temperature and high pressure hell.

Mars:Mars

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Mars, which is red in appearance and erratic in the night sky, was in ancient times.China is called Yinghua, WesternCall it Mars, but these two names actually represent the same meaning in their respective civilizations, That is war.

From the use of telescopes to discover seasonal changes on Mars, Humans have imagined Martian civilization and Martian life, but with the launch of dozens of subsequent probes And data return, these beautiful illusions about Mars have been ruthlessly broken.

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So in most people’s minds, Mars has become a desolate planet similar to the moon.

But the scientific community does not think so, because they are Riverbed and seabed, thin atmosphere and two poles ice caps, and a lake of liquid water hidden deep beneath Mars.

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Although the above conditions are not enough to prove the existence of life on Mars, at least it is much better than Venus. At least the future landing and development of mankind will not have much problem, although It’s a little farther away from the earth, and its volume is much smaller than that of Venus, but it’s better than nothing.

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As an alternative planet for colonization, Mars has good basic conditions,It also has basic industrial mineral resources, which can build basic The industrial base, taking local materials, continuously expands the scope of the Martian colony.

On the high-temperature and high-pressure Venus, mining and depositing The difficulty of building an industrial base is unimaginable.

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In the case that the existing technology is not enough to frequently detect the outer planets of the solar system such as Jupiter and Saturn,Mars will only receive more and more attention in the future, and the detection efforts will also increase.

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From the perspective of the future evolution of the solar system,Because the sun will increase its luminosity by 1%every 110 million years, more Venus and the earth, which are close to the sun, will only get hotter and hotter, while the farther Mars, the ice caps in the polar regions may be melted by the sun, and oceans all over the world will appear again.

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p data-track=”24″>< span style=”color:494949; –tt-darkmode-color:9D9D9D;”>On this point alone, Mars should get more attention and exploration power than Venus.