在现有的科技水平下，如果失去了太阳，人类能存活多久？
从本质上来讲，太阳是地球唯一的能量来源，是地球生命得以繁衍生息的重要保障。
如果失去了太阳，地球也就失去了孕育生命的基本条件，已知的所有生命形式都会在这颗星球上消失。当然，不同的生命形式应对环境突变的能力不同，所以能够继续存活的时间也不相同，其中存活时间最长的肯定就是我们人类了。科学与文明将人类与其它生物彻底分隔开来，依靠现代科技，人类拥有了其它生物无可比拟的应对环境变化的能力，那么人类是否能够在失去太阳之后存活下来呢？
在现有的科技水平下，如果失去了太阳，人类能存活多久？
如果太阳突然消失，那么地球并不会马上陷入黑暗，因为地球与太阳之间的距离足够遥远，所以太阳光走过这段距离大概需要8分20秒的时间。
在8分20秒之后，随着最后一缕太阳光抵达地球，光明才会彻底从这颗星球上消失。当然，消失的不仅是太阳，还有月亮。月亮是地球的卫星，本身并不会发光，它依靠反射太阳光来给夜空增添一份光明，而没有了太阳，月亮自然也就隐匿在了黑暗之中。
在现有的科技水平下，如果失去了太阳，人类能存活多久？
不过这并不意味着夜空将变得一片漆黑，相反，此时的夜空可能会比以往任何时候都更加美丽。
因为太阳系中唯一的光源消失了，所以遥远恒星的光芒则会显得异常明亮，我们会看到满天的繁星，会看到我们父辈儿时才见过的美丽夜空，这也许就是太阳留给我们的最后一份礼物。这样的宁静持续不了太长的时间，因为失去了太阳的照耀，地球温度会持续下降，我们会清晰地感觉到气温越来越低了。大概在三天左右的时间之后，地球表面的温度便会下降到0℃以下，而且是所有的地方。
在现有的科技水平下，如果失去了太阳，人类能存活多久？
当然，这个时候我们还可以躲在家里，利用现代化的电器进行取暖，不过我们依然会亲身感受到寒冷的逼近，因为地球降温的速度会逐渐加快。
大概在一周之后，地球表面的温度便会下降到零下20℃左右。步步逼近的寒冷让我们感到恐惧，但这并不是真正要命的地方，以人类现有的科技水平，严寒并不足以威胁到我们的生命，真正可怕的是生命存在的基础正在逐渐消失。什么是生命存在的基础？氧气。没有了阳光的照耀，植物没有办法进行光合作用，所以植物开始大面积地死亡。
大概只需要一周的时间，地球上90%的植物便会彻底死亡。
没有了氧气的制造者，地球上的氧气开始不断减少。现在留给人类的时间已经不多了，如果人类想要继续延续下去，唯一的途径就是集中全部力量建设地下城。当然，短时间内想要建造十分庞大的地下构筑物是不太现实的，而且地下城的氧气需要人工制取，且其它的生命支持系统也都是有限的，所以也就注定了只有极少部分的人能够前往地下生活。对于绝大多数的人而言，在太阳消失之后，生命也就随之进入了倒计时。
在现有的科技水平下，如果失去了太阳，人类能存活多久？
当然，这些都只是单纯的假设，因为太阳并不会突然消失，至少不会悄无声息地消失。
太阳作为一颗恒星，唯一会导致其熄灭的原因就是能量的耗尽，而在能量耗尽之时，太阳会发生氦闪，这种强烈的天体活动会产生巨大的能量，地球生态将因此被摧毁，随后太阳的体积会急剧膨胀并吞没地球轨道，整个地球都会消失在太阳的怀抱之中，所以我们也无需为太阳消失之后的事情而烦恼了。当然，这一切并不会很快到来，那是30到50亿年之后的事情。
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Essentially, the sun is the earth's only source of energy and an important guarantee for the proliferation of life on earth.
If the sun is lost, the earth will lose the basic conditions for life, and all known life forms will disappear on this planet. Of course, different life forms have different abilities to cope with environmental changes, so they can continue to survive for different periods of time. Among them, the ones that survive the longest are definitely us humans. Science and civilization have completely separated humans from other creatures. Relying on modern technology, humans have the ability to cope with environmental changes that is unparalleled by other creatures. So, can humans survive after losing the sun?
With the current level of technology, how long can humans survive if the sun is lost?
With the current level of technology, how long can humans survive if the sun is lost?
If the sun suddenly disappears, the earth will not immediately fall into darkness, because the distance between the earth and the sun is far enough, so it takes about 8 minutes and 20 seconds for sunlight to travel this distance.
After 8 minutes and 20 seconds, as the last ray of sunlight reaches the earth, the light will completely disappear from the planet. Of course, not only the sun disappeared, but also the moon. The moon is a satellite of the earth and does not emit light on its own. It relies on reflected sunlight to add light to the night sky. Without the sun, the moon will naturally be hidden in darkness.
With the current level of technology, how long can humans survive if the sun is lost?
With the current level of technology, how long can humans survive if the sun is lost?
But this doesn't mean the night sky will become pitch black. On the contrary, the night sky may be more beautiful than ever before.
Because the only light source in the solar system has disappeared, the light of distant stars will appear extremely bright. We will see the sky full of stars, and we will see the beautiful night sky that our fathers only saw when they were children. This may be what the sun left to us. The last gift. This kind of tranquility will not last too long, because without the sun's illumination, the earth's temperature will continue to drop, and we will clearly feel that the temperature is getting lower and lower. In about three days, the temperature on the earth's surface will drop below 0°C, everywhere.
With the current level of technology, how long can humans survive if the sun is lost?
With the current level of technology, how long can humans survive if the sun is lost?
Of course, at this time we can still hide at home and use modern appliances for heating, but we will still feel the approaching cold personally because the earth's cooling rate will gradually accelerate.
In about a week, the temperature on the earth's surface will drop to about minus 20°C. The approaching cold makes us feel scared, but it is not really fatal. With the current level of human science and technology, severe cold is not enough to threaten our lives. What is really scary is that the foundation for the existence of life is gradually disappearing. What is the basis for the existence of life? oxygen. Without sunlight, plants cannot carry out photosynthesis, so plants begin to die in large areas.
With the current level of technology, how long can humans survive if the sun is lost? With the current level of technology, how long can humans survive if the sun is lost?
In about a week, 90% of the plants on the earth will die completely.
Without the producer of oxygen, the oxygen on the earth began to decrease. There is not much time left for mankind now. If mankind wants to continue, the only way is to concentrate all its efforts on building underground cities. Of course, it is unrealistic to build very large underground structures in a short period of time, and the oxygen in the underground city needs to be produced artificially, and other life support systems are also limited, so it is destined that only a very small number of them will be used. people are able to live underground. For most people, after the sun disappears, life enters a countdown.
Under the current level of technology, how long can humans survive if the sun is lost?
Under the current level of technology, how long can humans survive if the sun is lost?
Of course, these are just assumptions, because the sun will not disappear suddenly, at least not quietly.
As a star, the only thing that will cause the sun to go out is the exhaustion of energy. When the energy is exhausted, the sun will have a helium flash. This intense celestial activity will generate huge energy, and the earth's ecology will be affected. After it is destroyed, the size of the sun will expand rapidly and engulf the earth's orbit, and the entire earth will disappear into the embrace of the sun, so we don't need to worry about what happens after the sun disappears. Of course, all this will not come soon, that will happen in 3 to 5 billion years.